Let me start with the most common misconception: Rotator cuff tears are very common, they aren’t always what’s causing the pain, and they don’t always require surgery.
I wrote this for anyone whose shoulder hurts, who can’t lift their arm, or who’s been told after an exam that “your rotator cuff is torn” or “you have calcification in your shoulder.”
What exactly is the rotator cuff?
The bones in your shoulder are shaped a lot like a golf ball sitting on a tee: the ball is large, and the tee is shallow.
What holds the ball firmly on the tee are four tendons wrapping around the shoulder joint, collectively called the “rotator cuff.” Their most important job isn’t actually rotating the arm, but keeping the shoulder joint from slipping out of place when you lift your arm.
Of the four, the top one, the supraspinatus, is the one that runs into trouble most often.
Why does it tear?
There are basically two ways:
- Slow wear and tear: The most common. More frequent as we get older, and people often can’t pinpoint the exact day it started.
- A single injury: Catching yourself during a fall, getting yanked hard, or a dislocated shoulder. Under 40, even an injury rarely causes a real tear (it’s usually a strain); over 40, an injury is more likely to actually tear the tendon.
People who do overhead work long-term (painting, carpentry) or play tennis or baseball are also more prone to issues.
If a tear shows up on imaging, is it definitely what’s hurting?
Not necessarily. This is the number one thing I want people to know.
One study looked at over 400 people with absolutely no shoulder pain and gave them ultrasounds. The results:
- In their 50s, about one in eight had a tear.
- In their 70s, about 30%.
- 80 and over, about half.
All of these people were pain-free and doing just fine.
So, a physician will first use physical exams to find the source of the pain, and then use imaging to confirm it, rather than seeing a tear and assuming it’s the culprit. There are many other possibilities for shoulder pain, like shoulder impingement, frozen shoulder, or a pinched nerve in the neck.
How does a doctor tell if it’s torn?
No single physical test can confirm it on its own. Doctors usually:
- Compare the difference between you lifting your arm and the doctor lifting it for you: if you can’t lift it yourself but someone else can lift it for you, it looks more like a rotator cuff tear. If it won’t go up either way, it looks more like frozen shoulder.
- Test your strength in different directions to see which tendon is weaker.
- Look at a combination of tests, which is much more accurate than looking at just one.
To be certain, both ultrasound and MRI work. For full-thickness tears, the accuracy of ultrasound and MRI is about the same; the advantage of ultrasound is that it’s cheap and you can look at it while the joint moves.
If it’s torn, do I have to have surgery?
Most people don’t need surgery right off the bat.
The 2025 guidelines from the American Academy of Orthopaedic Surgeons say it clearly: for small-to-medium tears from slow wear and tear, both doing physical therapy properly and having surgery will show improvement in the long run. A large study following over 400 people also found that of those who did rehab, about three-quarters didn’t need surgery, and the effects were still holding up ten years later.
But you should know one thing: for people who don’t get surgery, more than half of the tears slowly get bigger over ten years. So if you choose rehab, it’s more reassuring to come back for regular follow-ups.
Surgery is usually discussed earlier in the following situations:
- You’re still young, and the tear isn’t small.
- You’ve done a full three to six months of rehab, and it’s still very painful or very weak.
- A tear caused by a single injury (covered in the next section).
What if I suddenly can’t lift my arm after a fall or being yanked?
If you’re over 40 and, after a fall or being pulled, your arm stays stuck and won’t go up, or is noticeably weak, I’d suggest seeing a doctor and getting imaging done early.
The reason is: for a fresh tear caused by an injury, the tendon quality is usually still pretty good. If evaluated early, there are more options to choose from. If it drags on, the muscle might slowly atrophy, and the results of sewing it back together won’t be as good.
This doesn’t mean you’re hopeless if you miss a certain window, but rather that “having a doctor look at it early” is a good deal.
If an older adult falls, dislocates their shoulder, and can’t lift their arm, they also need to be checked for nerve damage at the same time. The two look very similar, but they’re managed differently.
Do injections help?
- Corticosteroids: Can relieve pain short-term, lasting a little over a month. But it’s not recommended to keep getting them. Multiple injections might degrade the tendon, making it harder to repair later.
- PRP (Platelet-Rich Plasma): For partial tears or tendon inflammation, study results are conflicting. The AAOS does not support its routine use.
- Prolotherapy (dextrose): Not recommended for full-thickness tears that go all the way through; there are some positive studies for tendon inflammation and partial tears.
The role of an injection is to “make it hurt less so you can do your rehab properly,” not to patch the hole.
How long does it take to recover after surgery?
- You’ll have to wear a sling for a while after surgery. The bigger the tear, the longer you wear it, roughly four to eight weeks.
- Many surgeons have someone start moving your shoulder passively for you in the very first week, to keep it from getting glued down; for large tears, motion is sometimes deliberately started a bit later.
- For most people, daily life is mostly fine after about half a year. Heavy labor or overhead sports take six to nine months.
And what is shoulder “calcification”?
This is a different disease, called “calcific tendinitis.” A small chalk-like piece of calcium grows inside the tendon. The tendon itself usually isn’t torn.
A few characteristics:
- It typically strikes people between 30 and 50, more often women.
- Many people have calcifications but absolutely no pain; they’re just found by accident on an X-ray.
- Some people will suddenly be in so much pain they won’t dare move their arm, or even be woken up by it.
That last point often scares people, but actually, that bout of severe pain often means the body is “eating” the calcium. It’s the resorption phase. Most calcifications will disappear on their own within a few years.
The sequence of treatment is generally:
- Pain relief and rehab first, maybe an injection if necessary.
- If it hasn’t improved at all, then consider using ultrasound guidance to break up and wash out the calcification, or doing shockwave therapy.
- If both fail, then consider surgery to take it out.
Which is better, lavage or shockwave? Studies show the medium-to-long-term effects are about the same. Lavage might be slightly better for pain relief at around the one-year mark.
One more thing: We only treat calcifications that hurt. If you have calcification in your shoulder but the location of the pain doesn’t match up, the pain might be coming from somewhere else, like your neck.
When should I see a doctor?
- You can’t lift your arm or it’s noticeably weak after a fall or being yanked.
- The shoulder pain lasts more than a few weeks, wakes you up at night, or you can’t sleep on your side.
- Your arm doesn’t hurt but you can’t lift it (this requires ruling out nerve issues).
- Sudden severe pain, completely afraid to move it (could be resorbing calcification, but needs to rule out other causes too).
If an older person’s shoulder repeatedly swells up and you can draw out a huge syringe of blood-tinged fluid, that might be a different disease. See Milwaukee shoulder.
Clinical Pearls
- Tear prevalence rises with age. In asymptomatic individuals, it’s 31% for ages 70–79 and 51% for 80+: A tear on imaging does not equate to the pain generator
Ombregt 3e Ch.15- A single physical test isn’t enough; Murrell’s triad (positive impingement sign + supraspinatus weakness + infraspinatus weakness; see “Combination tests”) has an LR of 48 if all three are positive, and LR of 0.02 if all three are negative
McGee 4e Ch.57- Small–medium full-thickness tear: Both PT and surgery improve patient-reported outcomes (AAOS Strong), but in the conservative group, 59% had tear enlargement of >5 mm within 10 years
AAOS RC CPG 2025- Shoulder weakness after acute trauma in those >40 years old → Prioritize ruling out full-thickness tear; consider repair within ~2 months
DeLee 5e Ch.47- Calcific tendinitis typically hits ages 31–50 and about 80% resorb spontaneously within 3 years
Ombregt 3e Ch.15; treat only those with symptoms. If conservative management fails, escalate to barbotage or high-energy ESWTMartinoli Ch.18,Gerdesmeyer 2003
Rotator Cuff Tear and Calcific Tendinitis: Abbreviations
| Abbreviation | Full Name |
|---|---|
| RC | Rotator cuff |
| FT | Full-thickness |
| PT | Physical therapy (in this note PT never means partial-thickness) |
| Constant | Constant-Murley score (0–100: pain, activities of daily living, range of motion, strength) |
| ASES | American Shoulder and Elbow Surgeons score |
| MCID | Minimal clinically important difference |
| LR / PPV | Likelihood ratio / positive predictive value |
| ROM / AROM / AAROM | Range of motion / active ROM / active-assisted ROM |
| ER / IR | External / internal rotation |
| GH / GH OA | Glenohumeral / glenohumeral osteoarthritis |
| LHB / LHBT | Long head of biceps (tendon) |
| SASD | Subacromial-subdeltoid bursa |
| MRA | MR arthrography |
| PRP / LP-PRP | Platelet-rich plasma / leukocyte-poor PRP |
| HA | Hyaluronic acid |
| VAS | Visual analogue scale (pain) |
| SCR | Superior capsular reconstruction |
| ESWT | Extracorporeal shockwave therapy |
| BCP | Basic calcium phosphate |
| RCT / MA / NMA / SR | Randomized controlled trial / meta-analysis / network MA / systematic review |
| CPG | Clinical practice guideline |
Disease Background
Definitions and Scope of This Note
- Rotator cuff = supraspinatus, infraspinatus, teres minor, and subscapularis tendons
Frontera 4e Ch.17- Main function is compressing the humeral head into the shallow glenoid, with rotation being secondary
Giangarra 4e Ch.23
- Main function is compressing the humeral head into the shallow glenoid, with rotation being secondary
- Partial-thickness tear: Does not extend through the full thickness of the tendon; classified as articular-surface, bursal-surface, or interstitial (intratendinous)
Mitra Ch.28 - Full-thickness tear: Extends all the way from the articular surface to the bursal surface; may involve only part of the width
Jacobson 3e Ch.3 - Massive tear: >5 cm or involving ≥2 tendons
Magee Pathology 2e Ch.7 - Scope of this note: Tears (partial/full/acute traumatic/massive irreparable) and calcific tendinitis
- For tendinopathy/subacromial pain without a tear → see shoulder impingement
- Cuff tear arthropathy with BCP crystal deposition → see Milwaukee shoulder
Anatomy
- Supraspinatus is most frequently involved; 62% of surgically confirmed tears are isolated supraspinatus
Martinoli Ch.6- Early degeneration and tears are mostly in the anterior half of the supraspinatus, just posterior to the LHB tendon
Martinoli Ch.6 - The starting point is often deep at the anterior insertion (articular side), where blood supply is poorest
Ombregt 3e Ch.15
- Early degeneration and tears are mostly in the anterior half of the supraspinatus, just posterior to the LHB tendon
- Subscapularis is the largest and strongest cuff muscle, providing about 50% of the cuff’s power on its own
DeLee 5e Ch.48 - Subscapularis and infraspinatus/teres minor create an anterior-posterior force couple to stabilize the glenohumeral joint
DeLee 5e Ch.48
Epidemiology
- Ultrasound prevalence in asymptomatic individuals (
Tempelhof 1999, n=411)Ombregt 3e Ch.15- 50–59 years: 13%, 60–69: 20%, 70–79: 31%, 80+: 51%
- Cadaver studies (mean age 59): full-thickness 19.9%, partial 32%
AAOS RC CPG 2025 - Without trauma, it’s rare under 40
DeLee 5e Ch.47 - If you have a symptomatic tear on one side, you often have an asymptomatic one on the other
DeLee 5e Ch.47- In patients whose symptomatic side has a full-thickness tear, the prevalence of a full-thickness tear on the painless side is 35.5% (
Yamaguchi 2006)Ombregt 3e Ch.15
- In patients whose symptomatic side has a full-thickness tear, the prevalence of a full-thickness tear on the painless side is 35.5% (
- Partial-thickness tears are about twice as common as full-thickness tears
Magee Pathology 2e Ch.7
Risk Factors
- Age >40: Most tears are age-related wear and tear
AAOS RC CPG 2025 - Repetitive heavy lifting or overhead work (painting, carpentry)
AAOS RC CPG 2025 - Repetitive microtrauma in overhead athletes (tennis, baseball pitchers)
AAOS RC CPG 2025 - Tears in young people mostly come from clear trauma (falls, shoulder dislocations)
AAOS RC CPG 2025 - Genetic predisposition: Sibling’s full-thickness tear is more likely to enlarge within 5 years
Giangarra 4e Ch.23 - Diabetes, hypertension, hyperlipidemia, smoking, BMI: AAOS 2025 only mentions under future research that their effect on outcomes needs study; they are not listed as risk factors
AAOS RC CPG 2025
Mechanisms
- Multifactorial etiology: Intrinsic degeneration + extrinsic impingement wear + microtrauma/macrotrauma
DeLee 5e Ch.47 - Degenerative vicious cycle
Ombregt 3e Ch.15- A bundle of fibers ruptures → increased load on adjacent fibers, microcirculation disrupted
- More tendon exposed to synovial fluid containing lytic enzymes → further rupture
- After a massive tear, the deltoid loses its opposition, and the humeral head migrates superiorly → easier to impinge
Frontera 4e Ch.17 - Acute trauma: Injury at >40 is more likely to actually rupture the tendon; <40 is mostly a strain
DeLee 5e Ch.47 - Subscapularis injuries follow a bimodal distribution
DeLee 5e Ch.48- Young: Arm hyperextension + external rotation trauma
- Older: Combined with anterior dislocation (series average 62.7 years)
- Iatrogenic: Subscapularis thinning after anterior approach surgeries (arthrotomy, z-plasty)
DeLee 5e Ch.48
- Unhappy triad = shoulder dislocation + cuff tear + peripheral nerve (usually axillary nerve) injury; axillary nerve injury risk is higher over age 40
Trescot Ch.31
Complications
- Tear enlargement → muscle atrophy, fatty infiltration progression → reaches a point of no return for repair
DeLee 5e Ch.47 - Rotator cuff tear arthropathy: Glenohumeral joint structural destruction caused by chronic tear (named by Neer 1977)
Magee Pathology 2e Ch.7- Superior migration of the humeral head alone, without joint surface destruction, does not count as arthropathy
Magee Pathology 2e Ch.7
- Superior migration of the humeral head alone, without joint surface destruction, does not count as arthropathy
- Pseudoparalysis: Cuff defect causes the humeral head to migrate superiorly and lose its fulcrum when the deltoid contracts, making the arm unable to lift past 90°
AAOS Postop Rehab 2018 Ch.9 - Long head of biceps is often co-involved
Frontera 4e Ch.17
Prognosis and Natural History
- Asymptomatic tears: At a mean follow-up of 2.8 years, 51% developed symptoms, and symptom onset correlated with tear enlargement
Magee Pathology 2e Ch.7 - Symptomatic tears are more likely to enlarge than asymptomatic ones
DeLee 5e Ch.47 - Conservative treatment at 10-year follow-up (Moosmayer)
AAOS RC CPG 2025- Tear enlargement >5 mm: 59%; >10 mm: 41%
- A separate Moosmayer 2017 cohort (37 with imaging), at a mean of 8.8 years: 49% had obvious atrophy, 41% had fatty degeneration grade 3–4
- Those with enlargement >10 mm had a Constant-Murley score (0–100) of 63.9, which is 14 points lower than those with <10 mm enlargement
- But conservative management is successful for most: In the MOON (Multicenter Orthopaedic Outcomes Network) cohort (n=452), PT was effective for about 75% at 2 years
Kuhn 2013- At 10-year follow-up, it was still >70% effective with no drop in patient-reported outcomes; only 1 person in the entire cohort underwent reverse shoulder arthroplasty
Kuhn 2024
- At 10-year follow-up, it was still >70% effective with no drop in patient-reported outcomes; only 1 person in the entire cohort underwent reverse shoulder arthroplasty
Clinical Assessment
Diagnostic Criteria
- Clinical diagnosis + imaging confirmation; any single physical exam test has limited accuracy
AAOS RC CPG 2025 - Combining multiple physical exams increases accuracy (Quality High / Strength Strong)
AAOS RC CPG 2025- These tests are better for ruling in than ruling out
AAOS RC CPG 2025
- These tests are better for ruling in than ruling out
- MRI, MRA, CT, and ultrasound can all supplement physical exam and X-ray (Strong)
AAOS RC CPG 2025 - Asymptomatic tears are too common → localize the pain generator with functional exams first, imaging is just a supplement
Ombregt 3e Ch.15
Assessment Tools
History
- Pain is anterolateral, can radiate to the lateral deltoid; hurts to sleep on that side, aggravated by overhead movements
Kelley Ch.49 - Night pain wakes the patient up, affecting sleep
Frontera 4e Ch.17 - Functional complaints: overhead activities, fastening a bra, filing paperwork
Frontera 4e Ch.17 - Traumatic (sudden severe pain) vs progressive (dull ache)
Kelley Ch.49 - Age itself is a clue: ≥60 years LR 3.2, ≤39 years LR 0.1
McGee 4e Ch.57
PE
- Active vs Passive ROM
DeLee 5e Ch.37- Full passive, limited active → Think large cuff tear
- Both active and passive limited, firm end point → Think adhesive capsulitis
- Both limited + glenohumeral crepitus → Think GH OA
- Excessive passive ER → Think subscapularis rupture
- Combinations of pain and weakness on resisted testing
Ombregt 3e Ch.15- Painful but not weak → tendinitis or partial tear
- Painful and weak → Think tear
- Painless weakness → massive tear or nerve issue
- LRs for individual tests (rotator cuff tear)
McGee 4e Ch.57- Drop arm test LR+ 2.9, but sensitivity is only 6–35%
- Infraspinatus weakness LR+ 2.6; supraspinatus weakness LR+ 2.0
- A positive painful arc has no diagnostic value for tears (LR+ NS); its absence gives LR− 0.5, only slightly lowering the probability
- Palpable tendon defect LR+ 10.2, but this was from senior orthopedic surgeons
- Combination tests
McGee 4e Ch.57- Murrell: positive impingement sign (neither McGee nor Murrell’s original specifies Neer or Hawkins) + supraspinatus weakness + infraspinatus (external rotation) weakness. Three positive LR 48; zero positive LR 0.02
- Park (Hawkins + painful arc + infraspinatus weakness; three positive LR 15.9, zero positive LR 0.2): McGee lists it under tears, but in the original
Park 2005this was the best combination for impingement syndrome; the best combination for full-thickness tears was painful arc + drop arm + infraspinatus weakness
| Muscle | Test | Positive Sign | Source |
|---|---|---|---|
| Supraspinatus | Jobe (empty can) / Full can | Weakness against resistance | Frontera 4e Ch.17 |
| Supraspinatus | Drop arm | Arm drops when slowly lowered from abduction | Frontera 4e Ch.17 |
| Infraspinatus / teres minor | ER lag sign at 0° | Drops back into internal rotation when released | Frontera 4e Ch.17 |
| Infraspinatus | ER lag at 90° (drop sign) | Unable to maintain ER at 90° abduction | Frontera 4e Ch.17 |
| Teres minor | Hornblower’s | Unable to externally rotate in abduction | Frontera 4e Ch.17 |
| Subscapularis | Lift-off / belly-press / belly-off / bear hug | Unable to maintain internal rotation | Frontera 4e Ch.17 |
Mapping lag signs to tendons (avoid misattribution)
- External rotation lag sign (at 0° and 90° abduction) → infraspinatus / teres minor
Frontera 4e Ch.17 - Drop arm test → supraspinatus
Frontera 4e Ch.17 - Lift-off / belly-press / bear-hug → subscapularis; this corresponds to internal rotation lag, not abduction lag
Frontera 4e Ch.17 - A massive anterior cuff tear (including subscapularis) can cause anterosuperior escape, with loss of the anterior force couple and significant disability
DeLee 5e Ch.48
Differentiating weakness
- Suprascapular neuropathy can exist alone or with a cuff tear
Frontera 4e Ch.17 - Cervical radiculopathy must be checked as well; EMG if necessary
Frontera 4e Ch.17 - Weakness after dislocation in older adults: cuff tear and axillary nerve palsy are often mistaken for each other → rule out cuff tear with imaging first, then do electrodiagnostic testing
DeLee 5e Ch.40
X-ray
- Standard: AP (internal/external rotation), axillary (West Point), true AP, Y view
Frontera 4e Ch.17 - Superior migration of the humeral head indirectly suggests a tear
Frontera 4e Ch.17 - Late stage: narrowed acromiohumeral gap, superior subluxation of the humeral head, erosion of the anterior acromion
Kelley Ch.49 - Can see calcifications (see “Calcific Tendinitis” section)
Frontera 4e Ch.16
Sono
- Accuracy (Table 17.2)
Frontera 4e Ch.17- Full-thickness: ultrasound (US) sensitivity 92% / specificity 94%, comparable to MRI (92/93)
- Partial-thickness: US 67/94, MRI 64/92, MRA 86/96
- Ultrasound LR+ ranges mostly from moderate to strong, LR− is scattered from poor to strong
AAOS RC CPG 2025 - Limitation is operator dependence; advantages are that it’s cheap and allows dynamic scanning
Frontera 4e Ch.17 - Positive predictive value of SASD effusion for rotator cuff tear is 70%; if accompanied by LHBT tenosynovial effusion, PPV rises to 95%
Jacobson 3e Ch.3 - Dynamic ultrasound can show anterior shoulder snapping: mostly the anterior recess of the subacromial bursa sliding under the coracoacromial ligament (case series, n=9); an unstable supraspinatus flap tear hitting the coracoacromial ligament is another cause (only 1 case in that study, not included in the analysis)
Delafontaine 2025- Technique: probe in sagittal / sagittal oblique, with the patient reproducing the snapping movement
Delafontaine 2025
- Technique: probe in sagittal / sagittal oblique, with the patient reproducing the snapping movement
MRI
- Four elements of interpretation
Frontera 4e Ch.17- Thickness: Fluid-equivalent signal on T2 traversing both surfaces = full-thickness; touching one surface = partial
- Fatty infiltration (Goutallier 0–4): T1 sagittal oblique; the original grading used CT
- Muscle atrophy: Evaluated at the most lateral slice where the coracoid and scapular spine meet
- Tendon retraction: Stage I–IV (see “Classification” section)
- Meta-analysis of 8 papers: MRI pooled LR− 0.10; it’s a good rule-out tool
AAOS RC CPG 2025 - Meta-analysis of 6 papers: MRA pooled LR+ 20.87; it’s a good rule-in tool
AAOS RC CPG 2025 - MRA is invasive, generally unnecessary unless a labral tear is suspected
Frontera 4e Ch.17 - CT can be used as an alternative when MRI is unavailable or contraindicated (AAOS deliberately upgraded its inclusion)
AAOS RC CPG 2025
Classification
| Aspect | Classification | Details | Source |
|---|---|---|---|
| Partial depth | Ellman | Grade 1 <3 mm, Grade 2 is 3–6 mm, Grade 3 >6 mm; also labeled articular/bursal/interstitial | Magee Pathology 2e Ch.7 |
| Partial proportion | Low / high grade | Low-grade <50% thickness, high-grade >50% | Mitra Ch.28 |
| Partial location | Snyder | A (articular), B (bursal), C (complete) + severity 0–4 | Magee Pathology 2e Ch.7 |
| Full size | 3 cm cutoff | Small–medium ≤3 cm vs large >3 cm; AAOS gives no formal classification but uses this cutoff in the single vs double row and post-op sling evidence | AAOS RC CPG 2025 |
| Massive | — | >5 cm or ≥2 tendons | Magee Pathology 2e Ch.7 |
| Retraction (coronal) | Four-stage coronal retraction | I: stump on greater tuberosity; II: exposes humeral head; III: retracted to glenoid; IV: retracted past glenoid | Frontera 4e Ch.17 |
| Muscle quality | Goutallier | 0: no fat; 1: some streaks; 2: less fat than muscle; 3: equal; 4: more fat than muscle | Frontera 4e Ch.17 |
- Neer impingement stages (stage III = spurs and tears) are covered in shoulder impingement
Magee Pathology 2e Ch.7
Differential Diagnosis
| Disease | Key Differentiating Points | Source |
|---|---|---|
| Adhesive capsulitis | Both active + passive ROM limited, firm end point | DeLee 5e Ch.37 |
| GH OA | Active + passive limited + glenohumeral crepitus; degeneration on X-ray | DeLee 5e Ch.37 |
| Calcific tendinitis | Calcification inside the cuff on X-ray/US; cuff is usually intact | Jacobson 3e Ch.3 |
| Cervical radiculopathy | Examine the cervical spine; electrodiagnostic testing if needed | Frontera 4e Ch.17 |
| Suprascapular neuropathy | Weakness of the cuff or scapular stabilizers; can be isolated or coexist with cuff tear | Frontera 4e Ch.17 |
| Axillary nerve palsy | Deltoid weakness after dislocation; rule out cuff tear with imaging first | DeLee 5e Ch.40 |
| Parsonage-Turner | Acute brachial neuritis, a brachial plexopathy | Frontera 4e Ch.17 |
| LHB tendinopathy | Pain in the bicipital groove, positive Speed test | Frontera 4e Ch.17 |
| AC joint pathology | Pain with cross-chest adduction | Frontera 4e Ch.17 |
Red Flags and Referral
- >40 years old with persistent pain or weakness after acute trauma → rule out full-thickness tear, refer to orthopedics early
DeLee 5e Ch.47 - Painless, obvious weakness → massive tear or nerve issue, both require further workup
Ombregt 3e Ch.15 - Weakness after dislocation in older adults → must check both cuff tear and axillary nerve
DeLee 5e Ch.40 - Older woman with recurrent massive blood-tinged joint effusions, very few osteophytes on X-ray → think Milwaukee shoulder
Kelley Ch.102
Clinical Management
Management Algorithm
Decision axes = trauma or not → tear depth and size → response to conservative management → reparability
Acute traumatic full-thickness tear (especially >40 years old)
- Early imaging confirmation, consider repair within ~2 months
DeLee 5e Ch.47- Better functional outcomes if surgery is <4 months post-injury, best if <3 weeks (retrospective study)
Gutman 2021- But a 1-year RCT (n=58, small acute traumatic tears, median 9.7 mm): PT and repair had comparable outcomes; 29% of unrepaired tears enlarged >5 mm
Ranebo 2020Degenerative small–medium full-thickness tear
- Both PT and surgery improve patient-reported outcomes (High / Strong)
AAOS RC CPG 2025- Give a full 3–6 months of conservative management first
DeLee 5e Ch.47- Inform patients choosing conservative care that “the tear might enlarge over 10 years”; consider regular clinical + imaging follow-up
AAOS RC CPG 2025- Exception: <50–60 years old with a >1 cm tear can consider early repair to prevent enlargement
DeLee 5e Ch.47Partial-thickness tear
- Low/intermediate grade: PT (Consensus), manage similarly to subacromial pain
AAOS RC CPG 2025- High-grade failing conservative care: debridement or repair; repair improves outcomes (Strong)
AAOS RC CPG 2025Massive irreparable tear
- Without arthritis: PT, biceps tenotomy/tenodesis, partial repair, tendon transfer, SCR, etc. (Consensus)
AAOS RC CPG 2025- With arthritis, conservative failure: reverse shoulder arthroplasty (Consensus)
AAOS RC CPG 2025
Treatment Goals
- Pain control, restoring function and strength
Frontera 4e Ch.16 - For reparable tears: Make the decision before fatty infiltration renders the tear irreparable
DeLee 5e Ch.47 - Don’t chase “imaging integrity”: Asymptomatic tears do not require treatment
Ombregt 3e Ch.15
Conservative Management
Physical Therapy (Mainstay)
- Small–medium FT tears: Two RCTs (Moosmayer, Kukkonen) showed both PT and surgery groups improved significantly
AAOS RC CPG 2025- The gap at 5 years didn’t reach MCID; at 10 years, the surgery group was 9.6 points higher on Constant, 15.7 higher on ASES
AAOS RC CPG 2025
- The gap at 5 years didn’t reach MCID; at 10 years, the surgery group was 9.6 points higher on Constant, 15.7 higher on ASES
- Long-term: PT improves patient-reported outcomes, but tear size, atrophy, and fatty infiltration can progress over 5–10 years (High / Strong)
AAOS RC CPG 2025 - Those with a successful repair (healed) have better outcomes than PT and retears (Moderate)
AAOS RC CPG 2025 - Risks: Those who switch to surgery only after PT fails have a Constant score 10 points lower than those repaired initially
AAOS RC CPG 2025 - MOON PT protocol: Follow-ups at 6 and 12 weeks. Surgeries mostly happened between 6 and 12 weeks
Kuhn 2013- Early crossover to surgery was primarily driven by “patient non-belief in PT efficacy”
Kuhn 2024
- Early crossover to surgery was primarily driven by “patient non-belief in PT efficacy”
- Rehab phases: Pain/inflammation control → restore ROM → strength and dynamic control → proprioception → sport-specific training
Frontera 4e Ch.16 - Exercise prescription details (scapular stabilizers, cuff strengthening, closed-chain → open-chain exercise (CKC→OKC)) are in shoulder impingement
Medications and Physical Modalities
- NSAIDs, COX-2 inhibitors, and acetaminophen for symptom control
Frontera 4e Ch.16- COX-2 inhibitors offer comparable pain relief with fewer GI and renal side effects
Frontera 4e Ch.16
- COX-2 inhibitors offer comparable pain relief with fewer GI and renal side effects
- Topical NSAIDs are non-inferior to oral for pain, with systemic side effects comparable to placebo
Frontera 4e Ch.16 - E-stim and low-level laser lack evidence, not recommended; icing can be used
Frontera 4e Ch.16
Injection Therapies
Corticosteroid
- A single injection of corticosteroid + local anesthetic can be considered for short-term pain and function (High quality / Moderate, downgraded due to heterogeneity)
AAOS RC CPG 2025- High-quality RCT: effective at 1.5 months, no difference at 4, 8, 12, 24 months
AAOS RC CPG 2025 - Injectable NSAIDs can be considered for those who cannot use steroids
AAOS RC CPG 2025
- High-quality RCT: effective at 1.5 months, no difference at 4, 8, 12, 24 months
- Multiple injections may compromise cuff integrity and affect future repairs (Limited)
AAOS RC CPG 2025 - Injections close to the time of surgery may negatively impact repair healing
AAOS RC CPG 2025 - Failure rate is about 40%, response is hard to predict
Frontera 4e Ch.17
Platelet-Rich Plasma (PRP)
- Injection for partial tears / tendinopathy: AAOS does “not support routine use” (High / Limited, downgraded)
AAOS RC CPG 2025- Rationale: Study results are conflicting, and it hasn’t proven superior to steroids.
- 2026 MA (10 RCTs, n=591) vs steroids: No difference at 3–6 weeks and 3 months
Yuwarungsikul 2026 - PRP better at 6 months: ASES +10.8, Constant +10.7, VAS −0.8; authors themselves concluded “statistically significant but of limited clinical benefit”
Yuwarungsikul 2026
- Non-operative injection for full-thickness tears: Routine use “may not be indicated” (Moderate / Limited)
AAOS RC CPG 2025 - Augmentation during surgery: Not recommended to improve patient-reported outcomes (Strong)
AAOS RC CPG 2025- Liquid PRP for lowering retears: Unstratified relative risk (RR) 0.43; but when stratified into partial/full retears, neither was significant
AAOS RC CPG 2025 - Leukocyte-poor PRP (LP-PRP) MA (9 RCTs, n=743): Retear RR 0.54, functional score improvements didn’t reach MCID
Hovland 2025
- Liquid PRP for lowering retears: Unstratified relative risk (RR) 0.43; but when stratified into partial/full retears, neither was significant
Dextrose Prolotherapy
- Prolotherapy is not recommended for full-thickness tears (High / Strong)
AAOS RC CPG 2025- High-quality studies have not shown it to be superior to controls; comparisons with steroids have mixed results
AAOS RC CPG 2025
- High-quality studies have not shown it to be superior to controls; comparisons with steroids have mixed results
- Tendinopathy (including partials, small FTs) has positive studies; falls under the scope of shoulder impingement
- 3 enthesis dextrose injections: At 9 months, 59% vs 37% vs 27% met the threshold for pain improvement
Bertrand 2016 - NMA: >24 weeks prolotherapy vs placebo pain standardized mean difference (SMD) 2.63; steroids only effective at 3–6 weeks
Lin 2019 - SR: Multi-site injections are better than rehab alone; single-site US-guided injection has no difference from controls
Catapano 2020
- 3 enthesis dextrose injections: At 9 months, 59% vs 37% vs 27% met the threshold for pain improvement
Hyaluronic Acid
- Can be considered only for cuff pathology “without tears” (High / Limited, downgraded)
AAOS RC CPG 2025
Surgical Interventions
Indications and Timing
- Acute trauma: Persistent weakness after injury >40 years old, consider repair within ~2 months
DeLee 5e Ch.47- Expert opinion favors repair for symptomatic acute traumatic tears
Frontera 4e Ch.17 - Acute traumatic tears strongly considered for surgery; MRI showing atrophy points to a chronic course and worse outcomes
Mitra Ch.28 - Pros of early repair: Good cuff mobility, good tissue quality; cuff tears associated with dislocation are also more stable after repair
Giangarra 4e Ch.23 - Early treatment of single-tendon tears can prevent progression to multi-tendon tears
Giangarra 4e Ch.23 - Retrospective n=206: Surgery <4 months resulted in 10.3 points higher ASES; best if <3 weeks
Gutman 2021
- Expert opinion favors repair for symptomatic acute traumatic tears
- Chronic degenerative: No trauma, >50 years old, try conservative first; operate only if conservative fails or there’s an “acute-on-chronic tear”
Giangarra 4e Ch.23- Must complete at least 3–6 months of conservative management before deeming it a failure
DeLee 5e Ch.47
- Must complete at least 3–6 months of conservative management before deeming it a failure
- High-grade partial (Ellman III): If conservative fails, can do conversion to full-thickness followed by repair, or in-situ transtendinous repair; both yield comparable results (Strong)
AAOS RC CPG 2025- Bursal-side retears are higher regardless of technique
AAOS RC CPG 2025 - Most small articular-sided partials can be debrided; high-grade should be seriously considered for repair
DeLee 5e Ch.47
- Bursal-side retears are higher regardless of technique
Evidence on Repair Techniques
- Arthroscopic vs open / mini-open: patient-reported outcomes and healing rates at >1 year are no different; arthroscopic is better for short-term ROM and pain (Strong)
AAOS RC CPG 2025- UKUFF trial (n=273): 1-year retear rates were high in both groups with no difference (arthroscopic 46.4%, open 38.6%)
Carr 2017
- UKUFF trial (n=273): 1-year retear rates were high in both groups with no difference (arthroscopic 46.4%, open 38.6%)
- Acromioplasty: Not recommended for routine use during small–medium FT tear repairs (Moderate)
AAOS RC CPG 2025 - Single vs double row: No difference in patient-reported outcomes (Strong); double row yields better results for >3 cm tears
AAOS RC CPG 2025- Double row lowers partial retears (RR 0.50), but full-thickness retears show no significant difference
AAOS RC CPG 2025
- Double row lowers partial retears (RR 0.50), but full-thickness retears show no significant difference
- Augmentation
AAOS RC CPG 2025- Marrow stimulation: No difference in patient-reported outcomes, may lower retears for larger tears (Strong)
- Human dermal allograft: Lowers retears, improves patient-reported outcomes (Moderate); porcine xenografts not recommended
- Bioinductive collagen implant: Lowers retears, improves patient-reported outcomes (Strong), but increases surgical time and cost
- Postoperative pain management: Multimodal or non-opioid monotherapies can be considered (Moderate)
AAOS RC CPG 2025 - Retears are very common: In the Moosmayer RCT (small–medium tears), retear rates in the repair group at 1, 5, and 10 years were 21%, 28%, and 34%
AAOS RC CPG 2025
Massive Irreparable Tear
- Mechanism of pseudoparalysis see “Complications” section
AAOS Postop Rehab 2018 Ch.9 - Without arthritis: PT, biceps tenotomy/tenodesis, partial repair, tendon transfer, SCR, debridement, balloon spacer, grafts (non-porcine) can all improve patient-reported outcomes (Consensus)
AAOS RC CPG 2025- Balloon spacer outcomes are contradictory; one paper comparing SCR vs tendon transfer showed SCR is better for pain and pseudoparalysis
AAOS RC CPG 2025
- Balloon spacer outcomes are contradictory; one paper comparing SCR vs tendon transfer showed SCR is better for pain and pseudoparalysis
- Without arthritis but significant loss of function, failure of other treatments: reverse shoulder arthroplasty can improve patient-reported outcomes (Consensus)
AAOS RC CPG 2025 - With arthritis (cuff tear arthropathy): reverse shoulder arthroplasty after conservative failure (Consensus)
AAOS RC CPG 2025- reverse shoulder arthroplasty combined with subscapularis repair yields better Constant scores and internal rotation (Moderate quality)
AAOS RC CPG 2025
- reverse shoulder arthroplasty combined with subscapularis repair yields better Constant scores and internal rotation (Moderate quality)
- reverse shoulder arthroplasty contraindication: Deltoid paralysis or deficiency (check the axillary nerve first in older patients after dislocation)
AAOS Postop Rehab 2018 Ch.9 - Both hemiarthroplasty and reverse shoulder arthroplasty can be used for cuff tear arthropathy
Kelley Ch.49
Postoperative Rehabilitation
- Sling use and initiation of active motion based on tear size (Table 23.2)
Giangarra 4e Ch.23- Partial to small (<1 cm): Sling for 4 weeks, start active at 4 weeks
- Medium to large (2–4 cm): Sling for 6 weeks, start active at 6 weeks
- Massive (>5 cm): Sling for 8 weeks, start active at 8 weeks
- Passive ROM must start within the first week; delaying it will lead to loss of mobility
Giangarra 4e Ch.23- The tendon is weakest around 3 weeks post-repair
Giangarra 4e Ch.23 - Supraspinatus tension is noticeably lower when the humerus is elevated 30–45°
Giangarra 4e Ch.23
- The tendon is weakest around 3 weeks post-repair
- One common protocol: Abduction pillow sling (20–30°) for 4–6 weeks, immediate passive motion, active at ~6 weeks, resistance at ~10 weeks
DeLee 5e Ch.47 - Another protocol: Immobilization 4–6 weeks → start AAROM at weeks 4–6 → AROM at week 8 → strengthening by week 12
Frontera 4e Ch.17 - Evidence
AAOS RC CPG 2025- Early (0–2 weeks) vs delayed (up to 8 weeks) initiation of motion: Comparable outcomes (High / Strong)
- Early motion restores ROM faster, catching up by 6 months; delayed motion tends to have higher healing rates, especially for large tears
- For select patients, the sling can be discontinued immediately, performing active motion within a comfortable range (Moderate)
- Post-op for small tears: A single PT instruction session + home exercises is non-inferior to supervised multi-session PT (Moderate)
- Subscapularis repair: Limit resisted internal rotation and limit passive external rotation for ~6 weeks
Giangarra 4e Ch.23 - Recovery timeline: Most can do the majority of activities of daily living (ADLs) at 6 months; heavy work and overhead sports take ~6–9 months
Magee Pathology 2e Ch.7- Return to play for athletes can take up to 18 months
Mitra Ch.28
- Return to play for athletes can take up to 18 months
Evidence × Setting Matrix
| Intervention / Setting | AAOS 2025 Strength | Conclusion | Source |
|---|---|---|---|
| Combined physical exams | Strong | Superior to single tests; stronger for ruling in | AAOS RC CPG 2025 |
| MRI / MRA / CT / US | Strong | All are useful adjuncts | AAOS RC CPG 2025 |
| Small–medium FT: PT vs surgery | Strong | Both improve; surgery slightly better at 10 years | AAOS RC CPG 2025 |
| Long-term conservative management | Strong | Tear size and fatty infiltration may progress | AAOS RC CPG 2025 |
| Single corticosteroid injection | Moderate | Short-term pain relief | AAOS RC CPG 2025 |
| Multiple corticosteroid injections | Limited | May compromise the cuff | AAOS RC CPG 2025 |
| Prolotherapy (FT tear) | Strong (Against) | Not recommended | AAOS RC CPG 2025 |
| PRP injection (partial / tendinopathy) | Limited | Routine use not supported | AAOS RC CPG 2025 |
| HA injection (no tear) | Limited | Can be considered | AAOS RC CPG 2025 |
| High-grade partial repair | Strong | Debridement or repair both acceptable; repair may improve outcomes | AAOS RC CPG 2025 |
| Routine acromioplasty | Moderate (Against) | Not recommended | AAOS RC CPG 2025 |
| Arthroscopic vs open | Strong | Long-term no difference, arthroscopic better short-term | AAOS RC CPG 2025 |
| Post-op early vs delayed motion | Strong | Comparable outcomes | AAOS RC CPG 2025 |
| Massive irreparable ± arthritis: reverse shoulder arthroplasty | Consensus | Can be considered after conservative failure | AAOS RC CPG 2025 |
Calcific Tendinitis
Definition and Mechanism
- Carbonate-apatite (hydroxyapatite) crystal deposition inside the rotator cuff, most commonly in the critical zone about 1 cm proximal to the supraspinatus insertion
Peng 2020 Ch.26 - Thought to be related to local hypoxia → fibrocartilaginous metaplasia → calcification
Martinoli Ch.6 - The underlying cuff is usually intact; it’s a different disease from a tear
Jacobson 3e Ch.3 - When symptomatic, it’s called calcific tendinitis, accompanied by inflammatory markers, neovascularization, and neoinnervation
Jacobson 3e Ch.3 - Distinct from linear enthesopathic calcifications caused by cuff degeneration, which respond poorly to aspiration
Malanga Ch.103
Epidemiology of Calcific Tendinitis
- Prevalence: 3–20%, mostly completely asymptomatic
Ombregt 3e Ch.15- 7.5–20% in asymptomatic adults, of which about half become symptomatic
Peng 2020 Ch.26 - Ultrasound prevalence of 24% in asymptomatic women
Jacobson 3e Ch.3
- 7.5–20% in asymptomatic adults, of which about half become symptomatic
- Typically hits ages 31–50, rare in the elderly
Ombregt 3e Ch.15 - More common in women; supraspinatus > infraspinatus > subscapularis
Jacobson 3e Ch.3 - Natural history: 80% resolve spontaneously within 3 years
Ombregt 3e Ch.15
Staging (Uhthoff)
| Stage | Pathology | Symptoms | Imaging | Source |
|---|---|---|---|---|
| Precalcific | Tendon fibrocartilaginous metaplasia | None | — | Jacobson 3e Ch.3 |
| Calcific: formative | Calcification forms, hard as chalk | None, or activity pain, low-grade pain worse at night | Well-defined margins, clear acoustic shadowing | Peng 2020 Ch.26, Martinoli Ch.6 |
| Calcific: resting | Fibrous tissue encapsulates the calcification | Large enough deposits can cause impingement | Same as above | Peng 2020 Ch.26, ElMiedany 1e Ch.7 |
| Calcific: resorptive | Vascular proliferation, macrophage phagocytosis; calcium leaks into bursa | Acute severe pain, markedly restricted ROM | Ill-defined margins, weak or no shadowing, toothpaste-like | Peng 2020 Ch.26, Martinoli Ch.6 |
| Postcalcific | Fibroblasts remodel the tendon | Resolution | Scarring | Jacobson 3e Ch.3 |
- Acute pain flares are significantly correlated with the histological “resorptive phase”: the pain is a sign of it “getting better”
Martinoli Ch.6 - Resorptive phase usually lasts for 2 weeks or more
Peng 2020 Ch.26
Evaluation
- Clinical: Subacute low-grade pain worse at night (formative), or acute severe pain, occasionally with fever (resorptive)
Martinoli Ch.6 - X-ray: AP (internal/neutral/external rotation) + outlet view; evaluates calcification size and location, bursal calcification, humeral head erosion
Martinoli Ch.6- About 7% of calcifications show no acoustic shadowing on ultrasound; if they are a thick fluid or slurry, X-rays may be normal
Jacobson 3e Ch.3
- About 7% of calcifications show no acoustic shadowing on ultrasound; if they are a thick fluid or slurry, X-rays may be normal
- Ultrasound classification
Martinoli Ch.6- Type I: Hyperechoic + clear shadowing (formative)
- Type II: Hyperechoic + faint shadowing; Type III: No shadowing or isoechoic (more likely resorptive)
- No shadowing, amorphous shape → acute symptoms; well-defined borders with shadowing → subacute/chronic
Jacobson 3e Ch.3 - Larger calcifications combined with SASD bursa abnormalities are more likely to be symptomatic
Jacobson 3e Ch.3- Power Doppler signal inside the calcification and a distended SASD bursa are the ultrasound findings most correlated with pain
ElMiedany 1e Ch.7
- Power Doppler signal inside the calcification and a distended SASD bursa are the ultrasound findings most correlated with pain
Management
Treat only symptomatic calcifications
- Asymptomatic calcifications do not require treatment; having calcification when you have shoulder pain doesn’t mean the calcification is the source of the pain
Martinoli Ch.18- Common error: Shoulder pain originating from the cervical spine is mistakenly treated as calcific tendinitis
Martinoli Ch.18
First-line: Conservative Management
- PT + short-term NSAIDs
Martinoli Ch.6 - When symptomatic, manage similarly to general cuff tendinitis: triamcinolone infiltration at the tenoperiosteal junction of the tendon; for recurrence, weekly procaine infiltrations 4–5 times
Ombregt 3e Ch.15 - Therapeutic ultrasound can promote calcification resorption and briefly relieve symptoms
Frontera 4e Ch.16
Second-line: After Conservative Failure
- US-guided barbotage (needling + lavage)
Malanga Ch.103- A single puncture into the center of the calcification, repeatedly injecting and releasing pressure until a cavity forms and the calcium is flushed into the syringe
Malanga Ch.103 - Conclude with a subacromial bursa injection of corticosteroid + local anesthetic to prevent crystal-induced inflammation
Martinoli Ch.18 - Clinical success rate is about 60–74%
Martinoli Ch.18; case series report 70–90% good/excellentMalanga Ch.103 - Large calcifications respond best; clusters of small calcifications almost always fail
Martinoli Ch.18 - No need to clear it all out: the residual calcification will mostly absorb on its own; too many needle passes might cause a tendon tear
Martinoli Ch.18 - Toothpaste-like calcifications in the resorptive phase are the easiest to aspirate; in the hard formative phase, the most common lavage indication is a deposit >1 cm in diameter
Peng 2020 Ch.26
- A single puncture into the center of the calcification, repeatedly injecting and releasing pressure until a cavity forms and the calcium is flushed into the syringe
- High-energy ESWT
- RCT (n=144): At 6 months, Constant score improvement was 31.0 for high-energy, 15.0 for low-energy, and 6.6 for sham; high-energy is superior to low-energy
Gerdesmeyer 2003 - But Cochrane (32 trials): Shows little overall clinical benefit for cuff disease as a whole, with no difference in subgroups with or without calcification
Surace 2020
- RCT (n=144): At 6 months, Constant score improvement was 31.0 for high-energy, 15.0 for low-energy, and 6.6 for sham; high-energy is superior to low-energy
Barbotage vs ESWT (Direct Comparison)
- RCT (n=201): Both improved at 3, 6, and 12 months, but barbotage reduced pain and calcification more
Del Castillo-González 2016 - MA (7 RCTs, n=709): No difference in pain at 12 and 26 weeks, but barbotage is better at 52 weeks; no difference in function; certainty of evidence is low to very low
Sconza 2024 - Mid-term follow-up of an RCT (mean 6.8 years, n=67): Constant scores were 94.4 (ESWT) vs 93.3 (barbotage), no difference; 94% overall reached MCID
van Noort 2026- Required additional treatment: ESWT 42%, barbotage 26% (P=.17); 15% in the barbotage group grew new calcifications in another tendon
van Noort 2026
- Required additional treatment: ESWT 42%, barbotage 26% (P=.17); 15% in the barbotage group grew new calcifications in another tendon
- Barbotage + steroids vs steroids alone: Barbotage is better at 1 year, no difference at 5 years, but the steroids-only group had more additional treatments (16 vs 4 people)
de Witte 2017
Third-line: Surgery
- Arthroscopic or open removal of calcification is a last resort
Malanga Ch.103 - MA (27 RCTs): Surgery provides a larger margin of functional improvement, while pain reduction is comparable to needling; it is reasonable to try needling or ESWT first
Angileri 2023
Evidence Summary
- Barbotage: Comparable to ESWT in the mid-term, pain might be better long-term (1 year); certainty of evidence is low —
Sconza 2024,van Noort 2026 - High-energy ESWT: A single high-quality RCT is positive, but Cochrane remains cautious regarding overall cuff disease —
Gerdesmeyer 2003,Surace 2020 - Presenting both pieces of evidence: The benefits of ESWT vary by dosage and population; it cannot be summarized by a simple “effective” or “ineffective”
How These Notes Were Generated
This note serves as my reference when handling shoulder issues in the clinic, and this time I reorganized it once more to put it on the blog.
Materials Used
- Society guidelines: The 2025 AAOS Clinical Practice Guideline for Management of Rotator Cuff Injuries. I adopted their recommendations and evidence strengths item by item.
- PM&R, orthopedic, and sports medicine textbooks: Frontera Essentials of PM&R 4e, DeLee 5e, Giangarra 4e, Ombregt (Cyriax) 3e, Magee Pathology 2e, Mitra, Kelley Rheumatology 11e, AAOS Postoperative Orthopaedic Rehabilitation.
- Physical exam evidence: Likelihood ratio data from McGee Evidence-Based Physical Diagnosis 4e.
- Ultrasound and intervention texts: Jacobson, Bianchi & Martinoli, Malanga Atlas, Peng (Ultrasound for Interventional Pain Management), El Miedany.
- Original literature: Retrospective studies on the timing of surgery for traumatic tears, the MOON 2-year and 10-year follow-ups on non-operative treatment, meta-analyses on PRP and prolotherapy, RCTs on shockwave and lavage for calcific tendinitis, and the Cochrane review on shockwave therapy.
Tools Used
audit_note.py— A custom note formatting audit script I wrote to check citation placements, images, and heading structures.- Textbook chapter cross-reference script — Ensures every “book title + chapter number” actually maps to the original text, rather than relying on memory for chapter numbers.
- PubMed MCP — Retrieves literature abstracts, filling in volume, issue, page numbers, DOIs, and PMIDs for the bibliography.
- textbook_search — Runs semantic search against my local textbook markdown indices.
- OpenEvidence — For an independent cross-check, taking every citation in its answers back to the PubMed original for verification.
- Custom Python/PIL drawing scripts — For the management pathway diagram and cover image (
scripts/figures/). - Hugo’s bilingual workflow
i18n_sync.py— Machine translates the English version first, then I manually proofread the medical terminology once more.
This workflow itself is written up in textbook-to-note. If you also have a Claude or Codex subscription, this kind of mechanical labor of fact-checking and organizing can be handed over to it, leaving the judgment calls to yourself. You can start with Getting Started with AI: Installation and First Steps and How to Talk to AI Agents.
About This Version
The pro version is taken directly from my own clinical notes and wasn’t rewritten for the blog. The citation format follows my note style (book title + chapter, or author + year; the full bibliography is below). Copyrighted images from textbooks and journals are not included here; all diagrams were redrawn by me.
If I’ve misunderstood anything, feel free to correct me.
Reference
Guidelines
- AAOS RC CPG 2025 — American Academy of Orthopaedic Surgeons. Management of Rotator Cuff Injuries Evidence-Based Clinical Practice Guideline. 2025.
Journals
- Gutman MJ, Joyce CD, Patel MS, et al. Early repair of traumatic rotator cuff tears improves functional outcomes. J Shoulder Elbow Surg. 2021;30(11):2475-2483. doi:10.1016/j.jse.2021.03.134. PMID 33774173
- Kuhn JE, Dunn WR, Sanders R, et al. Effectiveness of physical therapy in treating atraumatic full-thickness rotator cuff tears: a multicenter prospective cohort study. J Shoulder Elbow Surg. 2013;22(10):1371-1379. doi:10.1016/j.jse.2013.01.026. PMID 23540577
- Kuhn JE, Dunn WR, Sanders R, et al. 2024 Kappa Delta Ann Doner Vaughan Award: Nonsurgical treatment of symptomatic, atraumatic full-thickness rotator cuff tears: a prospective multicenter cohort study with 10-year follow-up. J Am Acad Orthop Surg. 2024;32(23):1061-1073. doi:10.5435/JAAOS-D-24-00841. PMID 39325825
- Yuwarungsikul C, Phisalaphong K, Thamrongskulsiri N, et al. Platelet-rich plasma provides modest but durable functional benefit over corticosteroid for rotator cuff tendinopathy: a systematic review and meta-analysis of randomized controlled trials. Knee Surg Sports Traumatol Arthrosc. 2026;34(8):2937-2950. doi:10.1002/ksa.70416. PMID 42021740
- Hovland S, Amin V, Liu J, Aceto M, Wright V. Perioperative leukocyte-poor platelet-rich plasma associated with reduced risk of retear after arthroscopic rotator cuff repairs: a systematic review and meta-analysis of randomized controlled trials. Arthroscopy. 2025;41(11):4762-4771. doi:10.1016/j.arthro.2025.05.015. PMID 40409437
- Bertrand H, Reeves KD, Bennett CJ, Bicknell S, Cheng AL. Dextrose prolotherapy versus control injections in painful rotator cuff tendinopathy. Arch Phys Med Rehabil. 2016;97(1):17-25. doi:10.1016/j.apmr.2015.08.412. PMID 26301385
- Lin MT, Chiang CF, Wu CH, et al. Comparative effectiveness of injection therapies in rotator cuff tendinopathy: a systematic review, pairwise and network meta-analysis of randomized controlled trials. Arch Phys Med Rehabil. 2019;100(2):336-349.e15. doi:10.1016/j.apmr.2018.06.028. PMID 30076801
- Catapano M, Zhang K, Mittal N, et al. Effectiveness of dextrose prolotherapy for rotator cuff tendinopathy: a systematic review. PM R. 2020;12(3):288-300. doi:10.1002/pmrj.12268. PMID 31642203
- Gerdesmeyer L, Wagenpfeil S, Haake M, et al. Extracorporeal shock wave therapy for the treatment of chronic calcifying tendonitis of the rotator cuff: a randomized controlled trial. JAMA. 2003;290(19):2573-2580. doi:10.1001/jama.290.19.2573. PMID 14625334
- Surace SJ, Deitch J, Johnston RV, Buchbinder R. Shock wave therapy for rotator cuff disease with or without calcification. Cochrane Database Syst Rev. 2020;3:CD008962. doi:10.1002/14651858.CD008962.pub2. PMID 32128761
- Del Castillo-González F, Ramos-Alvarez JJ, Rodríguez-Fabián G, et al. Extracorporeal shockwaves versus ultrasound-guided percutaneous lavage for the treatment of rotator cuff calcific tendinopathy: a randomized controlled trial. Eur J Phys Rehabil Med. 2016;52(2):145-151. PMID 26365144
- Sconza C, Palloni V, Lorusso D, et al. Ultrasound-guided percutaneous lavage for the treatment of rotator cuff calcific tendinopathy: a systematic review with meta-analysis of randomized controlled trials. Eur J Phys Rehabil Med. 2024;60(6):995-1008. doi:10.23736/S1973-9087.24.08544-7. PMID 39382530
- van Noort DM, Louwerens JKG, Sierevelt IN, van Noort A. Comparable midterm outcomes for ultrasound-guided needling versus high-energy shockwave therapy for rotator cuff calcific tendinitis: a randomized controlled trial. Arthroscopy. 2026. doi:10.1002/arj.70405. PMID 42496014
- de Witte PB, Kolk A, Overes F, Nelissen RGHH, Reijnierse M. Rotator cuff calcific tendinitis: ultrasound-guided needling and lavage versus subacromial corticosteroids: five-year outcomes of a randomized controlled trial. Am J Sports Med. 2017;45(14):3305-3314. doi:10.1177/0363546517721686. PMID 28898104
- Angileri HS, Gohal C, Comeau-Gauthier M, et al. Chronic calcific tendonitis of the rotator cuff: a systematic review and meta-analysis of randomized controlled trials comparing operative and nonoperative interventions. J Shoulder Elbow Surg. 2023;32(8):1746-1760. doi:10.1016/j.jse.2023.03.017. PMID 37080421
- Delafontaine A, Guillin R, Ropars M, Collin P. Snapping of the subacromial bursa: a new cause of shoulder pain demonstrated with dynamic ultrasound. Biomedicines. 2025;13(4):766. doi:10.3390/biomedicines13040766. PMID 40299355
- Ranebo MC, Björnsson Hallgren HC, Holmgren T, Adolfsson LE. Surgery and physiotherapy were both successful in the treatment of small, acute, traumatic rotator cuff tears: a prospective randomized trial. J Shoulder Elbow Surg. 2020;29(3):459-470. doi:10.1016/j.jse.2019.10.013. PMID 31924516
- Carr A, Cooper C, Campbell MK, et al. Effectiveness of open and arthroscopic rotator cuff repair (UKUFF): a randomised controlled trial. Bone Joint J. 2017;99-B(1):107-115. doi:10.1302/0301-620X.99B1.BJJ-2016-0424.R1. PMID 28053265
- Park HB, Yokota A, Gill HS, El Rassi G, McFarland EG. Diagnostic accuracy of clinical tests for the different degrees of subacromial impingement syndrome. J Bone Joint Surg Am. 2005;87(7):1446-1455. doi:10.2106/JBJS.D.02335. PMID 15995110
Textbooks
- Frontera 4e Ch.16 / Ch.17 — Essentials of Physical Medicine and Rehabilitation. 4th ed. Elsevier; 2019. Rotator Cuff Tendinopathy; Rotator Cuff Tear.
- DeLee 5e Ch.37 / Ch.40 / Ch.47 / Ch.48 — DeLee, Drez & Miller’s Orthopaedic Sports Medicine. 5th ed. Elsevier; 2020.
- Giangarra 4e Ch.23 — Clinical Orthopaedic Rehabilitation. 4th ed. Elsevier; 2018. Rotator Cuff Repair.
- Ombregt 3e Ch.15 — A System of Orthopaedic Medicine. 3rd ed. Elsevier; 2013. Disorders of the contractile structures (shoulder).
- Magee Pathology 2e Ch.7 — Pathology and Intervention in Musculoskeletal Rehabilitation. 2nd ed. Elsevier. Rotator Cuff Pathology.
- McGee 4e Ch.57 — Evidence-Based Physical Diagnosis. 4th ed. Elsevier; 2018. Examination of the Musculoskeletal System.
- Mitra Ch.28 — Principles of Rehabilitation Medicine. McGraw-Hill; 2019. A Brief Review of Common Sports-Related Injuries.
- Jacobson 3e Ch.3 — Fundamentals of Musculoskeletal Ultrasound. 3rd ed. Elsevier; 2018. Shoulder Ultrasound.
- Martinoli Ch.6 / Ch.18 — Bianchi S, Martinoli C. Ultrasound of the Musculoskeletal System. Springer; 2007.
- Malanga Ch.103 — Atlas of Ultrasound-Guided Musculoskeletal Injections. McGraw-Hill; 2014. Lavage and Aspiration of Rotator Cuff Calcific Tendinosis.
- Peng 2020 Ch.26 — Peng P, Finlayson R, Lee SH, Bhatia A, eds. Ultrasound for Interventional Pain Management: An Illustrated Procedural Guide. Springer; 2020. Ch.26 Calcific Tendinitis Intervention.
- ElMiedany 1e Ch.7 — Musculoskeletal Ultrasonography in Rheumatic Diseases. Springer; 2015. Crystal-Induced Arthritis.
- Kelley Ch.49 / Ch.102 — Firestein & Kelley’s Textbook of Rheumatology. 11th ed. Elsevier; 2021.
- AAOS Postop Rehab 2018 Ch.9 — Postoperative Orthopaedic Rehabilitation. AAOS; 2018. Shoulder Arthroplasty.
- Trescot Ch.31 — Peripheral Nerve Entrapments. Springer; 2016.