Shoulder

SLAP Tear

A SLAP tear affects the upper labrum where the biceps tendon attaches to the shoulder socket. It can cause deep pain, clicking, or reduced performance, especially with overhead activity. Because labral changes can also appear on MRI in people without symptoms, diagnosis requires matching the examination and imaging to the patient's experience and goals.

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What is slap tear?

SLAP stands for Superior Labrum Anterior to Posterior. The superior labrum is the fibrocartilaginous rim at the top of the glenoid (shoulder socket) that deepens the joint cavity, provides stability, and serves as the anchor point for the long head of the biceps tendon.

SLAP stands for Superior Labrum Anterior to Posterior. The superior labrum is the fibrocartilaginous rim at the top of the glenoid (shoulder socket) that deepens the joint cavity, provides stability, and serves as the anchor point for the long head of the biceps tendon. A SLAP tear involves detachment or disruption of this superior labral tissue, extending both in front of and behind the biceps anchor.

Snyder Classification (Types I–IV)

The most widely used classification was described by Snyder in 1990:

Type I: Fraying and degeneration of the superior labrum without detachment; the biceps anchor is intact. Common incidental finding in older patients.
Type II (most common, ~55%): Detachment of the superior labrum and biceps anchor from the glenoid rim. Surgery may be considered when this finding matches the symptoms and appropriate nonsurgical care has not restored function.
Type III: Bucket-handle tear of the superior labrum with an intact biceps anchor; the central fragment may displace into the joint.
Type IV: Bucket-handle tear extending into the biceps tendon itself; the biceps tendon is split.

Type II SLAP tears are subdivided by location (anterior, posterior, or combined) and represent the primary surgical target.

Mechanisms of Injury

SLAP tears arise via three principal mechanisms:

Overhead throwing (traction-compression): The repetitive peel-back forces of the late cocking and early acceleration phases stress the posterior biceps anchor. Common in baseball pitchers, tennis players, and swimmers.
Traction injuries: Sudden inferior traction — catching a heavy falling object, a shoulder dislocation — can avulse the labrum from the glenoid.
Compressive load (fall on outstretched hand): Drives the humeral head superiorly, shearing the superior labrum.

Symptoms — do you recognize these?

Deep anterior or posterior shoulder pain, often described as "inside" the joint
Painful clicking, popping, or catching with overhead motion
Pain at the extremes of shoulder rotation — especially the late cocking position in throwers (arm back, externally rotated)
Loss of throwing velocity or accuracy
A sense of shoulder instability or "dead arm" in athletes
Pain with bench pressing or push-ups (posterior type II)

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How we diagnose it

Physical Examination

Several provocative tests aid diagnosis, though none is definitive in isolation:

O'Brien Active Compression Test: The arm is forward-flexed to 90°, adducted 10–15°, and internally rotated (thumb down). The examiner applies downward force. Pain or clicking reproduced in this position but relieved with the palm supinated (facing up) suggests a SLAP tear.
Speed's Test: Resisted forward flexion of the shoulder with the elbow extended and forearm supinated; pain in the bicipital groove suggests long head biceps or SLAP pathology.
Crank Test and Anterior Slide Test: Additional provocative maneuvers used in combination to improve diagnostic accuracy.

No single test has sufficient sensitivity or specificity to confirm the diagnosis independently; clinical presentation and imaging are always integrated.

Imaging

X-rays: Typically normal; obtained to exclude osseous pathology.
MRI Arthrogram (gold standard): Intra-articular gadolinium contrast distends the joint capsule, improving sensitivity for superior labral tears to >80–90%. The undercutting of contrast beneath the biceps anchor is the classic finding in Type II SLAP tears. Standard (non-contrast) MRI has lower sensitivity for SLAP lesions.

Treatment options

Non-Operative Management

Many patients — particularly those with Type I tears, older patients, or those with low overhead demands — respond well to a structured physical therapy program focusing on rotator cuff strengthening, posterior capsular stretching (sleeper stretches), and scapular stabilization. Three to six months of dedicated PT is pursued before surgical consideration.

Surgical Procedure

Shoulder Arthroscopy (Diagnostic & Operative)

Minimally invasive diagnostic and operative scope of the glenohumeral joint and subacromial space, used to evaluate and treat labral tears, rotator cuff pathology, AC joint arthritis, loose bodies, and synovitis.

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SLAP Repair

Arthroscopic suture anchor repair of the superior glenoid labrum (SLAP) for overhead athletes with symptomatic type II tears. Patient selection is critical. Biceps tenodesis is preferred for patients over 35 or with concurrent biceps pathology.

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Biceps Tenodesis

Surgical detachment of the long head of the biceps tendon from its labral origin and reattachment to the proximal humerus, eliminating biceps tendon pain and SLAP-related symptoms while preserving elbow flexion and supination strength.

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Recovery & rehabilitation

Non-operative: Return to sport 3–6 months with dedicated therapy
SLAP repair: Return to overhead sport 6–9 months; interval throwing programs for pitchers begin ~5–6 months post-operatively
Biceps tenodesis: Return to full activity approximately 4–6 months; typically faster than SLAP repair with lower retear risk

Frequently Asked Questions

Can a SLAP tear heal without surgery?

Type I SLAP tears (fraying only) and many Type II tears in non-overhead athletes can be managed successfully with PT. Surgery is reserved for those with persistent symptoms despite adequate conservative treatment.

Should I have a SLAP repair or a biceps tenodesis?

This depends heavily on age and activity level. For young competitive overhead athletes (especially pitchers under 35), SLAP repair is often preferred. For patients over 35 or those who are not competitive overhead athletes, biceps tenodesis offers reliable pain relief with a faster recovery and lower re-operation rate.

How long until I can pitch again after SLAP repair?

Most pitchers return to competitive throwing at 9–12 months. Return at 6 months is possible for position players or non-pitching overhead athletes.