Patient-friendly interpretation

What each finding means

Likely clinical outcomes

1. Improves with non-operative care
   Many patients obtain satisfactory pain control and function with activity modification, a targeted rehabilitation program, and limited adjunctive medication/injection treatment. This is especially plausible if strength is preserved, symptoms are gradual-onset, and activities can be modified.
2. Persistent pain or loss of function despite rehabilitation
   The high-grade nature of the supraspinatus tear makes this more likely than with a low-grade tear, particularly in a dominant arm, manual worker, overhead athlete, or patient with clinically meaningful weakness.
3. Tear enlargement or conversion to a full-thickness tear
   Degenerative partial-thickness tears do not reliably heal structurally. Some progress in size, including to full-thickness defects, although imaging progression does not always parallel symptoms. Campbell's notes that partial-thickness tears have limited spontaneous healing potential and that a proportion enlarge or progress, while still recommending initial non-operative care for most patients - Campbell's Operative Orthopaedics, 15th ed., p. 2455.
4. Labral tear remains incidental or becomes symptomatic
   The posterior labral lesion may be incidental in a degenerative shoulder. If it produces reproducible mechanical symptoms, posterior instability, or pain despite cuff-directed treatment, it may influence arthroscopic planning.
5. Post-treatment recovery
   With cuff repair, pain and function commonly improve, but recovery is prolonged. Biological tendon healing and progressive rehabilitation usually take several months. Risks include postoperative stiffness, persistent pain, and structural non-healing/retear.

Suggested clinical correlation

• Dominance, occupation, sporting/overhead demands, smoking, diabetes, and trauma/onset history.
• Active and passive ROM, scapular mechanics, painful arc, impingement signs, cuff strength and lag signs.
• Supraspinatus-specific weakness: Jobe/empty-can, full-can, external rotation strength.
• Biceps: groove tenderness, Speed/Yergason, dynamic instability if suspected.
• Posterior labrum: posterior joint-line tenderness, jerk/Kim test, posterior load-and-shift, O'Brien in context, mechanical clicking/catching, instability symptoms.
• AC joint: focal tenderness and cross-body adduction.
• Plain radiographs if not already obtained: AP/Grashey, axillary, scapular-Y, assessing acromial morphology, AC arthrosis, glenohumeral OA, calcification, and tuberosity changes.

Treatment approach

1. Initial non-operative treatment

• Temporarily avoid painful repetitive overhead loading, heavy lifting away from the body, dips, and provocative pressing.
• Maintain shoulder motion. Avoid prolonged immobilization.
• Physiotherapy focused on:
  • scapular positioning/control
  • posterior capsular mobility where restricted
  • gradual rotator-cuff and deltoid strengthening within a tolerable range
  • serratus anterior and lower/middle trapezius strengthening
  • work/sport-specific progressive loading
• Simple analgesia and a short, individualized NSAID course where appropriate.
• Address sleep position and ergonomic contributors.

2. Injection options

3. When to consider surgery

• Acute traumatic onset with objective weakness
• Persistent night pain or clinically important functional limitation despite adequate treatment
• Dominant-arm symptoms in an overhead athlete/manual worker
• Failure to progress with well-supervised rehabilitation
• Clear progression or increasing weakness
• A symptomatic posterior labral lesion with mechanical symptoms/instability that fits the clinical picture

• Assess true tear depth, tissue quality, bursal inflammation, biceps, and labrum.
• High-grade supraspinatus lesion: in-situ/transtendon repair versus tear completion and repair. Current comparative evidence does not establish a functional winner between these two repair techniques (Longo et al., 2024, PMID 38932614).
• Selective bursectomy/debridement where appropriate.
• Acromioplasty only if there is a convincing mechanical/structural indication, rather than routinely.
• Posterior labral debridement versus repair only if arthroscopic correlation and symptoms support it.
• Biceps treatment only if there is meaningful biceps pathology clinically/arthroscopically.

A concise way to counsel the patient

“You have a significant partial tear and wear of one of the main shoulder tendons, with inflammation around it. The tendon is not completely torn through, so we usually first try to settle the inflammation and rebuild shoulder control and strength with focused physiotherapy. Many people improve without surgery. Because the tear is high grade, however, there is a higher chance that pain or weakness may persist or that the tear can enlarge over time. If a proper rehabilitation program does not restore acceptable function, keyhole surgery to repair the tendon is a reasonable option. The tear in the cartilage rim at the back of the socket may or may not be causing symptoms and will be treated according to your examination and any instability or catching symptoms.”