Rotator Cuff Tear
Upper LimbOverview
A rotator cuff tear involves partial or complete disruption of one or more of the four muscles (supraspinatus, infraspinatus, teres minor, subscapularis) that stabilize the glenohumeral joint. Tears can be acute from trauma or chronic from degenerative changes, leading to pain, weakness, and functional limitation of the shoulder. The severity ranges from partial thickness tears to complete rotator cuff tears affecting overhead activities and quality of life.
Pathophysiology
The rotator cuff muscles maintain dynamic stability of the glenohumeral joint against the larger deltoid muscle. Tears disrupt this stabilizing mechanism, allowing abnormal joint mechanics, altered scapulohumeral rhythm, and compensatory overload of remaining structures. This leads to inflammation, secondary impingement, muscle atrophy, and progressive degenerative changes if left untreated. Chronic tears may involve tendon retraction and fatty infiltration of muscle.
Patient Education
Understanding that rotator cuff tears require early intervention to prevent progression; controlled movement within pain-free ranges during healing, combined with progressive strengthening, offers the best outcomes for both conservative and post-surgical management.
Typical Presentation
Site
Anterolateral shoulder, often radiating to lateral upper arm; pain may localize to specific rotator cuff muscles depending on which tendon is affected
Quality
Sharp or aching pain with movement; may feel like clicking, catching, or instability; burning sensation in some cases
Intensity
Mild to severe (6-9/10), often worse with night pain and sleeping on affected side; intensity often increases with overhead activities
Aggravating
Overhead reaching, lifting, throwing, sleeping on affected shoulder, internal rotation, forced external rotation, repetitive shoulder activities
Relieving
Rest, ice, anti-inflammatory medications, immobilization, gentle passive motion, downward pressure on shoulder, abduction to 90 degrees with support
Associated
Weakness with specific movements (positive drop arm test), loss of active range of motion, scapular dyskinesis, shoulder impingement signs, possible audible clicking or clunking
Orthopaedic Tests
Supraspinatus Test (Empty Can/Jobe's Test)
Procedure
Patient stands or sits with the arm abducted to 90° and internally rotated (thumb pointing downward, 'empty can' position). The examiner applies downward resistance while the patient resists.
Positive Finding
Weakness, pain, or inability to maintain resistance against the examiner's downward force.
Sensitivity / Specificity
Reference: Gismervik SØ et al., BMC Musculoskelet Disord 2017; PMID 28122541
Interpretation
Moderate sensitivity and specificity for supraspinatus tear. More sensitive than Drop Arm test but less specific. Useful as a screening test when combined with others. Pain is common in rotator cuff pathology but does not distinguish tears from tendinopathy. The empty-can (supraspinatus) test pools at 74% sensitivity / 77% specificity for any full-thickness rotator cuff tear (Gismervik 2017 meta-analysis, highest single-test DOR 9.24).
Drop Arm Test
Procedure
Patient is seated or standing with the arm abducted to 90° and externally rotated. The examiner applies gentle downward pressure to the distal forearm; the patient is then asked to slowly lower the arm.
Positive Finding
Inability to lower the arm slowly and controllably, or the arm drops suddenly through the range of motion.
Related reference: Park HB et al., J Bone Joint Surg Am 2005; PMID 15995110
Interpretation
Highly specific for full-thickness rotator cuff tear, particularly supraspinatus tears. A positive test strongly suggests a significant rotator cuff lesion, but low sensitivity means a negative test does not exclude small or partial tears. Park (2005) reported the drop-arm test as specific but insensitive; no single confirmed pair is shown.
Infraspinatus Strength Test (Crank Test)
Procedure
Patient is seated with the shoulder abducted to 90° and externally rotated. The examiner applies internal rotation resistance against the patient's isometric hold.
Positive Finding
Weakness or pain during external rotation resistance, or inability to maintain position against moderate resistance.
Related reference: Park HB et al., J Bone Joint Surg Am 2005; PMID 15995110
Interpretation
Suggests infraspinatus tear or significant muscle weakness. Positive results correlate with posterior rotator cuff pathology. Particularly useful in combination with other tests. Park (2005) reported the infraspinatus strength test as highly specific (~90%) for rotator cuff disease; sensitivity is lower and a single confirmed pair is not shown.
Lift-Off Test (Gerber's Test)
Procedure
Patient is seated or standing with the shoulder internally rotated behind the back; the examiner attempts to lift the hand away from the back (or patient attempts to hold hand against the back against resistance).
Positive Finding
Inability to initiate or maintain lift-off, or hand cannot be lifted away from the back.
Related reference: Gerber C & Krushell RJ, J Bone Joint Surg Br 1991; PMID 1670434
Interpretation
High specificity for subscapularis tear. Very specific but low sensitivity, particularly for isolated partial tears. A positive test is strong evidence of subscapularis involvement. Negative test does not rule out pathology. Original description Gerber & Krushell 1991 (JBJS Br — the previously cited "Gerber 1992" year was incorrect); no clean diagnostic-accuracy pair.
Painful Arc Test
Procedure
Patient actively abducts the shoulder through full range of motion. The examiner observes for a specific range where pain is reported.
Positive Finding
Pain reproduction between 60–120° of abduction, with relief beyond 120° or below 60°.
Related reference: Park HB et al., J Bone Joint Surg Am 2005; PMID 15995110
Interpretation
Moderate sensitivity and specificity for rotator cuff pathology. Non-specific finding that may occur with subacromial impingement, bursitis, or tendinopathy. Should be combined with other tests for diagnostic accuracy. Park (2005) reported the painful arc at ~74% sensitivity, but a matched specificity varied by severity; shown Not verified pending a single confirmed pair.
Lag Signs (Belly-Press and Hornblower Signs)
Procedure
Belly-Press: Patient internally rotates the shoulder with the elbow flexed, maintaining the hand against the abdomen against resistance. Hornblower: Patient attempts to maintain external rotation at 90° abduction against resistance.
Positive Finding
For Belly-Press: inability to maintain internal rotation position (lag). For Hornblower: inability to maintain external rotation (lag or positive Hornblower sign).
Related reference: Hertel R et al., J Shoulder Elbow Surg 1996; PMID 8872929
Interpretation
Lag signs indicate subscapularis (Belly-Press) or infraspinatus/teres minor (Hornblower) involvement. More specific than strength testing for detecting full-thickness tears. Useful for differentiating full-thickness from partial tears. Hertel (1996, J Shoulder Elbow Surg — not JBJS) described the external rotation lag sign as highly specific for rotator cuff rupture; no single confirmed sensitivity/specificity pair is shown.
⚠ Red Flags
- •Acute severe trauma with complete loss of function suggesting acute complete tear
- •Progressive neurological deficit or upper limb nerve compression signs
- •Signs of septic arthritis (fever, warmth, erythema, severe swelling)
- •Shoulder dislocation or significant fracture on imaging
- •Severe night pain unresponsive to conservative treatment for >6 weeks
- •Symptoms of cervical myelopathy or brachial plexus injury
⚡ Yellow Flags
- •Workers' compensation or litigation involvement affecting rehabilitation motivation
- •Fear-avoidance beliefs limiting active participation in therapy
- •Catastrophizing about shoulder function and prognosis
- •High anxiety or depression affecting pain perception and recovery
- •Inconsistent symptom presentation or non-mechanical pain pattern
- •Poor sleep quality secondary to pain affecting tissue healing
- •Unrealistic expectations about timeline for return to overhead activities
Osteopathic Techniques
Region
Rotator cuff muscles (supraspinatus, infraspinatus, teres minor, subscapularis)
Technique
Rationale
Soft tissue mobilization reduces muscle tension, improves blood flow to healing tissue, and addresses trigger points and fibrosis around the tear; gentle techniques preserve tissue integrity while promoting neural mobility
Region
Scapula and associated musculature (rhomboids, serratus anterior, levator scapulae)
Technique
Rationale
Scapular dysfunction contributes significantly to rotator cuff pathology; releasing scapular muscles restores normal scapulohumeral rhythm and reduces compensatory stress on the rotator cuff during healing
Region
Glenohumeral joint and joint capsule
Technique
Rationale
Gentle articulation within pain-free ranges maintains joint nutrition, prevents adhesion formation, and optimizes proprioceptive feedback without stressing healing tissue
Region
Cervical spine and upper thoracic segments
Technique
Rationale
Cervical and thoracic restrictions alter scapular positioning and shoulder mechanics; muscle energy techniques restore normal spinal mechanics and reduce neural tension affecting the shoulder complex
Region
Sternoclavicular and acromioclavicular joints
Technique
Rationale
Restoring normal kinematics of the distal clavicle and acromioclavicular joint optimizes scapular positioning and reduces impingement forces on rotator cuff structures
Region
Pectoralis major and minor, anterior shoulder
Technique
Rationale
Pectoral tightness increases internal rotation bias and anterior shoulder instability; releasing these muscles improves scapular mechanics and reduces anterior migration of the humeral head
Add-On Approaches
Chinese Medicine
Acupuncture targeting LI15 (Jianyu), LI14 (Binao), TE14 (Jianliao), and local points over rotator cuff muscles may reduce inflammation and pain; moxibustion can warm and improve circulation to cold, stagnant shoulder tissues; herbal formulae addressing qi stagnation and blood stasis support tissue healing
Chiropractic
Glenohumeral and scapulohumeral joint adjustments combined with scapular manipulation may restore normal arthrokinematics; soft tissue techniques and instrument-assisted therapies address myofascial restrictions contributing to rotator cuff dysfunction
Physiotherapy
Progressive resistance training with focus on rotator cuff strengthening (external rotation, internal rotation, supraspinatus isolation), scapular stabilization exercises, proprioceptive training, and gradual return to overhead activities with proper mechanics
Remedial Massage
Soft tissue massage and myofascial release of rotator cuff muscles, upper trapezius, levator scapulae, and pectoral muscles; cross-friction techniques on tendon-muscle junctions; deep pressure to trigger points while avoiding direct pressure over acute tear site
Rehabilitation Exercises
Pendulum Circles (Codman's Exercise)
Passive Range of Motion with Pulley System
Sleeper Stretch (Internal Rotation)
Posterior Shoulder Stretch (Cross-Body Adduction)
External Rotation with Resistance Band (Neutral Position)
Internal Rotation with Resistance Band
Prone Horizontal Abduction (T-Y-I Series)
Quadruped Rhythmic Stabilization
Scapular Retraction and Depression (Prone or Standing)
Proprioceptive Training on Unstable Surface (Push-up Position)
Side-Lying External Rotation
Prone External Rotation (90/90 Position - Thrower's Position)
Referral Criteria
- •Acute complete rotator cuff tear with inability to achieve active range of motion despite 4-6 weeks of conservative treatment
- •Persistent functional limitation affecting work or activities of daily living unresponsive to 8-12 weeks of conservative management
- •Positive imaging findings (ultrasound or MRI) confirming rotator cuff tear with progressive symptoms or functional decline
- •Suspicion of superior labral pathology (SLAP lesion) or associated labral tear
- •Failure to progress despite appropriate osteopathic and physiotherapy intervention; consider orthopedic surgical consultation
- •Development of secondary impingement syndrome or frozen shoulder despite appropriate management
- •Neurological deficits suggesting nerve involvement beyond mechanical shoulder dysfunction
- •Patient desire for surgical intervention for definitive repair, particularly in high-demand or younger patients