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Question 2101

Topic: Shoulder & Hip Sports

A 22-year-old collegiate baseball pitcher presents with posterior shoulder pain during the late cocking phase of throwing. He has a 20-degree loss of internal rotation (GIRD) compared to the contralateral side. MRI arthrogram reveals articular-sided, partial-thickness tears of the posterior supraspinatus and anterior infraspinatus. What is the primary underlying pathophysiology?

. Subcoracoid impingement
. Contact between the greater tuberosity and posterosuperior glenoid
. Primary subacromial impingement
. Acromioclavicular joint arthrosis
. Anterior capsular contracture

Correct Answer & Explanation

. Contact between the greater tuberosity and posterosuperior glenoid


Explanation

Internal impingement in overhead athletes occurs due to excessive external rotation and abduction (late cocking phase). This causes the posterosuperior rotator cuff to impinge between the greater tuberosity and the posterosuperior glenoid labrum.

Question 2102

Topic: Shoulder & Hip Sports
A 55-year-old man presents with anterior shoulder pain and increased external rotation after a fall. Examination demonstrates a positive bear-hug test. MRI shows a complete avulsion of the upper two-thirds of the subscapularis tendon with retraction to the glenoid rim. According to the Lafosse classification, what type of tear is this?
. Type I
. Type II
. Type III
. Type IV
. Type V

Correct Answer & Explanation

. Type III


Explanation

In the Lafosse classification, Type III is a complete tear of the upper two-thirds of the subscapularis with retraction to the glenoid rim. Type IV is a complete tear with retraction to the glenoid, and Type V retracts medial to the glenoid.

Question 2103

Topic: Shoulder & Hip Sports

A 29-year-old professional volleyball player presents with vague posterior shoulder pain and weakness in external rotation. Examination reveals profound atrophy of the infraspinatus fossa, while the supraspinatus fossa is preserved. MRI is most likely to show a paralabral cyst at which of the following locations?

. Suprascapular notch
. Spinoglenoid notch
. Quadrilateral space
. Triangular interval
. Subcoracoid space

Correct Answer & Explanation

. Spinoglenoid notch


Explanation

Compression of the suprascapular nerve at the spinoglenoid notch selectively denervates the infraspinatus, leading to isolated external rotation weakness. Compression at the suprascapular notch affects both the supraspinatus and infraspinatus.

Question 2104

Topic: Shoulder & Hip Sports

A 22-year-old rugby player has recurrent anterior shoulder instability. A 3D CT reconstruction shows 25% anterior glenoid bone loss. What is the most appropriate surgical management?

. Arthroscopic Bankart repair
. Arthroscopic Remplissage alone
. Latarjet procedure
. Open inferior capsular shift
. Arthroscopic thermal capsulorrhaphy

Correct Answer & Explanation

. Latarjet procedure


Explanation

The Latarjet procedure (coracoid transfer) is indicated for patients with recurrent anterior instability and critical anterior glenoid bone loss (>20-25%). Arthroscopic Bankart repair in this setting is associated with unacceptably high recurrence rates.

Question 2105

Topic: Shoulder & Hip Sports

A 25-year-old male undergoes a Latarjet procedure for recurrent anterior shoulder instability. Postoperatively, he exhibits profound weakness in elbow flexion and decreased sensation over the lateral forearm. Which of the following nerves was most likely injured during the procedure?

. Axillary nerve
. Radial nerve
. Musculocutaneous nerve
. Ulnar nerve
. Median nerve

Correct Answer & Explanation

. Musculocutaneous nerve


Explanation

The musculocutaneous nerve courses an average of 3-5 cm distal to the tip of the coracoid process. Retraction of the conjoined tendon during the Latarjet procedure places this nerve at significant risk.

Question 2106

Topic: Shoulder & Hip Sports

A 55-year-old manual laborer presents with a massive, irreparable posterosuperior rotator cuff tear. He has an intact subscapularis and active forward elevation to 130 degrees, but profound weakness in external rotation resulting in a positive hornblower's sign. A latissimus dorsi tendon transfer is planned. The latissimus dorsi muscle is primarily innervated by which of the following nerves?

. Long thoracic nerve
. Dorsal scapular nerve
. Thoracodorsal nerve
. Axillary nerve
. Lower subscapular nerve

Correct Answer & Explanation

. Thoracodorsal nerve


Explanation

The latissimus dorsi is innervated by the thoracodorsal nerve (C6-C8). It is transferred to the greater tuberosity to substitute for an irreparable posterosuperior rotator cuff tear, converting its function to external rotation and humeral head depression.

Question 2107

Topic: Shoulder & Hip Sports

During an arthroscopic Bankart repair for a patient with a 15% anterior glenoid bone loss and a large, engaging Hill-Sachs lesion, a remplissage procedure is performed. This procedure involves tenodesis of which of the following structures into the humeral head defect?

. Subscapularis tendon and middle glenohumeral ligament
. Supraspinatus tendon and superior capsule
. Infraspinatus tendon and posterior capsule
. Long head of the biceps tendon
. Teres minor tendon and inferior capsule

Correct Answer & Explanation

. Infraspinatus tendon and posterior capsule


Explanation

The remplissage procedure addresses an engaging Hill-Sachs lesion by tethering the infraspinatus tendon and the posterior capsule into the bony defect. This converts the intra-articular defect to an extra-articular one.

Question 2108

Topic: Shoulder & Hip Sports

A 50-year-old man undergoes a latissimus dorsi tendon transfer for an irreparable posterosuperior rotator cuff tear. Biomechanically, this transfer improves shoulder elevation primarily through which of the following mechanisms?

. Re-establishing the transverse force couple
. Depressing the humeral head to provide a stable fulcrum for the deltoid
. Acting as a powerful in-phase external rotator
. Increasing the tension of the coracoacromial ligament
. Directly replacing the supraspinatus elevation moment

Correct Answer & Explanation

. Depressing the humeral head to provide a stable fulcrum for the deltoid


Explanation

The latissimus dorsi is an out-of-phase muscle that primarily acts via a tenodesis effect to depress the humeral head. This provides a stable fulcrum, allowing the native deltoid muscle to efficiently elevate the arm.

Question 2109

Topic: Shoulder & Hip Sports

A 22-year-old collegiate baseball pitcher presents with posterior shoulder pain during the late cocking and early acceleration phases of throwing. Examination demonstrates a glenohumeral internal rotation deficit (GIRD) of 25 degrees. What is the primary pathoanatomy associated with this condition?

. Impingement of the greater tuberosity against the acromion
. Subcoracoid impingement of the subscapularis
. Contact between the articular surface of the rotator cuff and the posterosuperior glenoid labrum
. Anterior capsular laxity leading to subluxation
. Compression of the axillary nerve in the quadrilateral space

Correct Answer & Explanation

. Contact between the articular surface of the rotator cuff and the posterosuperior glenoid labrum


Explanation

Internal impingement occurs in overhead athletes when the arm is in maximum abduction and external rotation. This position causes the articular surface of the supraspinatus and infraspinatus to abut the posterosuperior glenoid rim and labrum, potentially leading to partial cuff tears.

Question 2110

Topic: Shoulder & Hip Sports

A 22-year-old competitive rugby player presents with his fourth anterior shoulder dislocation this season. A CT scan of the shoulder reveals 26% anterior glenoid bone loss. He has a positive apprehension test and an engaging Hill-Sachs lesion. Which of the following is the most appropriate surgical management?

. Arthroscopic Bankart repair with capsulorrhaphy
. Open coracoid transfer (Latarjet procedure)
. Arthroscopic superior labrum anterior and posterior (SLAP) repair
. Arthroscopic remplissage alone
. Open inferior capsular shift

Correct Answer & Explanation

. Open coracoid transfer (Latarjet procedure)


Explanation

In young collision athletes with recurrent anterior instability and critical glenoid bone loss (>20-25%), a Latarjet procedure (coracoid transfer) is indicated. Arthroscopic Bankart repair has an unacceptably high failure rate in the setting of significant bone loss.

Question 2111

Topic: Shoulder & Hip Sports

A 30-year-old professional volleyball player presents with insidious onset of right shoulder weakness. Examination shows full active range of motion and normal strength in abduction, but marked weakness in external rotation with the arm at the side. MRI reveals a paralabral cyst in the spinoglenoid notch. Which muscle is primarily affected?

. Supraspinatus
. Infraspinatus
. Teres minor
. Subscapularis
. Deltoid

Correct Answer & Explanation

. Infraspinatus


Explanation

Compression of the suprascapular nerve at the spinoglenoid notch affects only the infraspinatus, causing isolated external rotation weakness. Cysts in this location are frequently associated with posterior labral tears.

Question 2112

Topic: Shoulder & Hip Sports

A 55-year-old male presents with persistent anterior shoulder pain and weakness after falling on an outstretched hand 3 weeks ago. On examination, he has a positive bear-hug test and increased passive external rotation compared to the uninjured side. Which tendon is most likely torn?

. Supraspinatus
. Infraspinatus
. Subscapularis
. Teres minor
. Long head of the biceps

Correct Answer & Explanation

. Subscapularis


Explanation

The subscapularis tendon is tested using the belly-press, lift-off, and bear-hug tests. Traumatic tears lead to increased passive external rotation and weakness in active internal rotation.

Question 2113

Topic: Shoulder & Hip Sports

A 40-year-old male presents with agonizing right shoulder pain that began 2 weeks ago and lasted for 10 days before subsiding. He now notes profound weakness when trying to abduct or externally rotate the arm. MRI of the shoulder is unremarkable. EMG shows acute denervation in the supraspinatus and deltoid. What is the most likely diagnosis?

. Parsonage-Turner syndrome
. Cervical radiculopathy (C5)
. Quadrilateral space syndrome
. Massive rotator cuff tear
. Pancoast tumor

Correct Answer & Explanation

. Parsonage-Turner syndrome


Explanation

Parsonage-Turner syndrome (idiopathic brachial neuritis) presents with severe, acute shoulder pain followed by patchy weakness and atrophy of the shoulder girdle. Management is primarily supportive, as the condition is usually self-limiting over 1-2 years.

Question 2114

Topic: Shoulder & Hip Sports

A 45-year-old female presents with anterior shoulder pain. Ultrasound evaluation demonstrates an empty bicipital groove, with the long head of the biceps tendon displaced medially. This finding is highly correlated with a tear of which of the following structures?

. Supraspinatus and superior glenohumeral ligament
. Subscapularis and coracohumeral ligament
. Infraspinatus and middle glenohumeral ligament
. Pectoralis major and short head of biceps
. Coracoacromial ligament and coracoclavicular ligament

Correct Answer & Explanation

. Subscapularis and coracohumeral ligament


Explanation

Medial subluxation of the long head of the biceps tendon is pathognomonic for an injury to the subscapularis tendon and the coracohumeral ligament, which comprise the medial biceps sling. Surgical management often involves subscapularis repair and biceps tenodesis.

Question 2115

Topic: Shoulder & Hip Sports

A 19-year-old female gymnast complains of bilateral shoulder pain and a feeling of instability. Physical exam reveals a positive sulcus sign, excessive anterior and posterior translation, and a Beighton score of 6/9. What is the most appropriate primary treatment?

. A focused physical therapy program for periscapular and rotator cuff strengthening
. Arthroscopic Bankart repair
. Arthroscopic capsular plication
. Open inferior capsular shift
. Latarjet procedure

Correct Answer & Explanation

. A focused physical therapy program for periscapular and rotator cuff strengthening


Explanation

Multidirectional instability (MDI) is primarily treated with a prolonged, minimum 6-month course of physical therapy focusing on periscapular and rotator cuff strengthening. Surgical stabilization is strictly reserved for patients who fail extensive conservative management.

Question 2116

Topic: Shoulder & Hip Sports

A 52-year-old male recreational tennis player presents with deep shoulder pain and a clicking sensation. MRI arthrogram shows a type II SLAP tear. He has mild AC joint arthrosis but an otherwise intact rotator cuff. What is the most appropriate surgical management for this specific lesion in this demographic?

. Arthroscopic SLAP repair with suture anchors
. Debridement of the labrum leaving the biceps anchor intact
. Open Latarjet procedure
. Arthroscopic biceps tenodesis
. Diagnostic arthroscopy followed by physical therapy

Correct Answer & Explanation

. Arthroscopic biceps tenodesis


Explanation

In older patients (typically >40-50 years) with symptomatic SLAP II tears, primary biceps tenodesis yields superior and more reliable clinical outcomes than SLAP repair. SLAP repair in this demographic has a significantly higher risk of postoperative stiffness and residual pain.

Question 2117

Topic: Shoulder & Hip Sports

A 40-year-old laborer presents with chronic, refractory anterior shoulder pain and profound internal rotation weakness. MRI shows a massive, retracted, and fatty-infiltrated subscapularis tendon tear (Goutallier stage 4), with completely intact supraspinatus and infraspinatus tendons. What is the most appropriate surgical management?

. Arthroscopic debridement
. Latissimus dorsi transfer
. Pectoralis major transfer
. Lower trapezius transfer
. Reverse total shoulder arthroplasty

Correct Answer & Explanation

. Pectoralis major transfer


Explanation

Pectoralis major transfer is indicated for younger, active patients with an isolated, irreparable subscapularis tear. Latissimus dorsi and lower trapezius transfers are typically reserved for irreparable posterosuperior rotator cuff tears.

Question 2118

Topic: Shoulder & Hip Sports

A 22-year-old rugby player presents with recurrent anterior shoulder instability after multiple dislocations. A 3D CT reconstruction reveals an 'inverted pear' shaped glenoid with 25% anterior bone loss. What is the most appropriate definitive management?

. Arthroscopic Bankart repair
. Arthroscopic Bankart repair with remplissage
. Open Bankart repair
. Coracoid transfer (Latarjet procedure)
. Iliac crest bone grafting

Correct Answer & Explanation

. Coracoid transfer (Latarjet procedure)


Explanation

An 'inverted pear' glenoid indicates critical bone loss (usually >20-25%), which is an absolute contraindication for soft-tissue stabilization alone. The Latarjet procedure restores stability through both a bony augmentation and the dynamic sling effect of the conjoint tendon.

Question 2119

Topic: Shoulder & Hip Sports

A 28-year-old elite volleyball player complains of vague posterior shoulder pain and weakness during her serve. Examination shows normal forward elevation and internal rotation, but weakness in isolated external rotation with the arm at the side. MRI is most likely to reveal a paralabral cyst at which location?

. Suprascapular notch
. Spinoglenoid notch
. Quadrilateral space
. Triangular interval
. Subcoracoid space

Correct Answer & Explanation

. Spinoglenoid notch


Explanation

A paralabral cyst at the spinoglenoid notch compresses the suprascapular nerve after it has already innervated the supraspinatus, leading to isolated infraspinatus weakness. Cysts at the suprascapular notch would affect both the supraspinatus and infraspinatus.

Question 2120

Topic: Shoulder & Hip Sports

A 55-year-old male construction worker presents with persistent deep shoulder pain. Examination reveals a positive O'Brien test and no rotator cuff weakness. MRI arthrogram demonstrates an isolated Type II SLAP lesion. After failure of a 6-month trial of physical therapy, what is the most appropriate surgical intervention?

. Arthroscopic SLAP repair using suture anchors
. Arthroscopic debridement of the labrum
. Open capsular shift
. Biceps tenodesis
. Biceps tenotomy and rotator interval closure

Correct Answer & Explanation

. Biceps tenodesis


Explanation

In patients older than 40-50 years with symptomatic Type II SLAP lesions, biceps tenodesis provides more reliable pain relief and higher return to work rates compared to SLAP repair. SLAP repairs in older populations are associated with significant postoperative stiffness and higher clinical failure rates.