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Question 1741

Topic: Shoulder & Hip Sports

A 42-year-old recreational weightlifter complains of persistent deep anterior shoulder pain, particularly during bench press and biceps curls. Physical examination reveals a positive O'Brien test that is relieved when the test is repeated with the forearm in supination, and distinct tenderness in the bicipital groove. MRI reveals a Type II SLAP lesion with concomitant severe tenosynovitis and partial tearing of the long head of the biceps tendon. What is the most appropriate definitive surgical management for this patient?

. Arthroscopic debridement of the SLAP lesion alone
. Arthroscopic SLAP repair using suture anchors
. Biceps tenotomy without tenodesis
. Biceps tenodesis with debridement of the SLAP lesion
. Coracoid transfer (Latarjet procedure)

Correct Answer & Explanation

. Biceps tenodesis with debridement of the SLAP lesion


Explanation

In patients older than 35-40 years, especially those with concomitant pathology of the long head of the biceps (LHB) tendon, biceps tenodesis combined with SLAP debridement provides more reliable pain relief and functional improvement. SLAP repair in this older demographic is associated with higher rates of postoperative stiffness, persistent pain, and subsequent revision surgery.

Question 1742

Topic: Shoulder & Hip Sports

A 19-year-old elite hockey player presents with gradual onset of deep groin pain exacerbated by hip flexion and internal rotation. Radiographs demonstrate a crossover sign and a prominent ischial spine sign. The alpha angle is measured at 45 degrees. Which of the following best describes the underlying morphologic abnormality and its typical associated labral and chondral pathology?

. Cam impingement with anterosuperior labral detachment and delamination
. Pincer impingement with labral crushing and contrecoup posteroinferior chondral injury
. Cam impingement with posterior labral tears and avascular necrosis
. Pincer impingement with avulsion of the ligamentum teres
. Mixed impingement with isolated ligamentum teres rupture

Correct Answer & Explanation

. Pincer impingement with labral crushing and contrecoup posteroinferior chondral injury


Explanation

A crossover sign and prominent ischial spine sign are radiographic markers of acetabular retroversion, which constitutes pincer-type femoroacetabular impingement. An alpha angle of 45 degrees is normal, ruling out cam morphology. Pincer impingement typically causes a linear compression (crushing) mechanism of the labrum and can lead to contrecoup (posteroinferior) chondral lesions due to a levering mechanism of the femoral head against the acetabular rim.

Question 1743

Topic: Shoulder & Hip Sports

A 23-year-old rock climber presents with recurrent anterior shoulder instability. An MRI arthrogram shows an anteroinferior labral tear and a large posterolateral humeral head defect (Hill-Sachs lesion). A 3D CT scan reveals 12% anterior glenoid bone loss. On dynamic arthroscopic evaluation, the Hill-Sachs lesion 'engages' the anterior glenoid rim when the arm is placed in abduction and external rotation. Which of the following is the most appropriate surgical intervention?

. Arthroscopic Bankart repair alone
. Arthroscopic Bankart repair with Remplissage
. Open Latarjet procedure
. Humeral head resurfacing
. Arthroscopic capsular shift without labral repair

Correct Answer & Explanation

. Arthroscopic Bankart repair with Remplissage


Explanation

The patient has recurrent anterior instability with an 'engaging' Hill-Sachs lesion and subcritical glenoid bone loss (12%, defined typically as < 15-20%). While an isolated Bankart repair has a high failure rate for engaging lesions, adding a Remplissage (infraspinatus tenodesis and posterior capsulodesis into the Hill-Sachs defect) converts the intra-articular defect to an extra-articular one, thereby preventing engagement. Since glenoid bone loss is subcritical, a Latarjet procedure is not strictly indicated, making Bankart with Remplissage the most appropriate treatment.

Question 1744

Topic: Shoulder & Hip Sports

A 25-year-old professional hockey player presents with chronic groin pain that worsens with prolonged sitting and deep hip flexion. Physical examination reveals a positive FADIR test. Radiographs demonstrate a pistol grip deformity of the proximal femur and an alpha angle of 65 degrees. Which of the following is the primary pathophysiologic mechanism for his intra-articular pathology?

. Chondral delamination from repetitive shear forces
. Linear impaction of the femoral neck against the acetabular rim
. Global overcoverage of the acetabulum
. Posterior subluxation of the femoral head
. Extra-articular ischiofemoral impingement

Correct Answer & Explanation

. Chondral delamination from repetitive shear forces


Explanation

The patient has Cam-type femoroacetabular impingement (FAI), characterized by an aspherical femoral head-neck junction (pistol grip deformity, alpha angle >55 degrees). During hip flexion, the aspherical portion enters the acetabulum, creating massive shear forces that lead to separation of the cartilage from the subchondral bone (chondral delamination) and subsequent labral tears, typically at the anterosuperior chondrolabral junction. Linear impaction is the mechanism for Pincer-type FAI.

Question 1745

Topic: Shoulder & Hip Sports

A 21-year-old collegiate rugby player sustains recurrent anterior shoulder dislocations. An en face 3D CT reconstruction of the glenoid demonstrates 22% anterior glenoid bone loss. Which of the following surgical procedures is most appropriate to restore stability?

. Arthroscopic Bankart repair with suture anchors
. Arthroscopic Remplissage and Bankart repair
. Latarjet procedure
. Open capsular shift
. Arthroscopic capsulolabral repair with plication

Correct Answer & Explanation

. Latarjet procedure


Explanation

Critical glenoid bone loss, typically defined as greater than 15-20% in collision athletes, leads to unacceptably high failure rates following isolated arthroscopic Bankart repair. The Latarjet procedure (coracoid transfer to the anterior glenoid) is the treatment of choice as it restores the bony arc and provides a dynamic sling effect from the conjoint tendon, effectively stabilizing the shoulder.

Question 1746

Topic: Shoulder & Hip Sports

A 22-year-old collegiate baseball pitcher presents with vague posterior shoulder pain and a decline in pitching velocity. Physical exam reveals a positive O'Brien test and positive posterior impingement sign. A peel-back mechanism of the superior labrum is visualized on MRI arthrogram. Which of the following physical exam findings is most commonly associated with this pathology?

. Increased external rotation and decreased internal rotation in abduction
. Decreased external rotation and increased internal rotation in abduction
. Global restriction of glenohumeral motion
. Isolated weakness in subscapularis testing
. Positive Hornblower's sign

Correct Answer & Explanation

. Increased external rotation and decreased internal rotation in abduction


Explanation

Throwing athletes commonly develop Glenohumeral Internal Rotation Deficit (GIRD), characterized by a loss of internal rotation and a compensatory increase in external rotation when measured in 90 degrees of abduction. This altered kinematics shifts the humeral head posterosuperiorly during the late cocking phase, leading to internal impingement and the 'peel-back' mechanism that causes Type II SLAP lesions.

Question 1747

Topic: Shoulder & Hip Sports

A 21-year-old collegiate rugby player presents with recurrent anterior shoulder instability. A 3D CT scan reveals 25% anterior glenoid bone loss and an engaging Hill-Sachs lesion. The surgeon plans an open Latarjet procedure. During the transfer of the coracoid process through the split in the subscapularis tendon, which of the following neurologic structures is at greatest risk of iatrogenic injury?

. Axillary nerve
. Musculocutaneous nerve
. Suprascapular nerve
. Radial nerve
. Median nerve

Correct Answer & Explanation

. Musculocutaneous nerve


Explanation

The musculocutaneous nerve typically enters the coracobrachialis muscle 3 to 8 cm distal to the coracoid tip. During a Latarjet procedure, aggressive retraction, mobilization, or inferior placement of the coracoid graft places the musculocutaneous nerve at significant risk. Although the axillary nerve is also at risk inferiorly, the musculocutaneous nerve is the classic nerve at risk during the coracoid mobilization and transfer phase.

Question 1748

Topic: Shoulder & Hip Sports

A 25-year-old professional hockey player undergoes hip arthroscopy for femoroacetabular impingement (FAI). Preoperative imaging demonstrated a prominent cam lesion with an alpha angle of 72 degrees. The surgeon performs an arthroscopic osteochondroplasty of the femoral head-neck junction. Resection of more than what percentage of the femoral neck diameter substantially increases the risk of a postoperative femoral neck fracture?

. 10%
. 20%
. 30%
. 40%
. 50%

Correct Answer & Explanation

. 30%


Explanation

During osteochondroplasty for a cam deformity in FAI, careful attention must be paid to the depth of resection. Biomechanical studies have demonstrated that resecting more than 30% of the anterolateral femoral neck diameter significantly decreases the load to failure, substantially increasing the risk of an iatrogenic femoral neck fracture.

Question 1749

Topic: Shoulder & Hip Sports

A 28-year-old elite male volleyball player presents with painless weakness of his dominant shoulder, noting a marked decrease in spiking power. Physical examination reveals normal forward elevation and abduction strength, but isolated profound weakness in external rotation. MRI reveals cystic fluid at the spinoglenoid notch. Which of the following muscles is expected to show denervation atrophy on electromyography (EMG)?

. Supraspinatus only
. Supraspinatus and infraspinatus
. Infraspinatus only
. Teres minor only
. Subscapularis

Correct Answer & Explanation

. Infraspinatus only


Explanation

A paralabral cyst or entrapment at the spinoglenoid notch compresses the suprascapular nerveafterit has already given off its motor branch to the supraspinatus. This results in isolated denervation and atrophy of the infraspinatus muscle, leading to isolated weakness in external rotation. Entrapment at the suprascapular notch (more proximal) would affect both the supraspinatus and infraspinatus.

Question 1750

Topic: Shoulder & Hip Sports

A 24-year-old professional rugby player presents with a history of recurrent anterior shoulder instability, having sustained 4 dislocations in the past year. Radiographic and CT imaging reveals a 25% anterior glenoid bone loss and an engaging Hill-Sachs lesion. What is the most appropriate surgical management to minimize his risk of recurrence?

. Arthroscopic Bankart repair with remplissage
. Open Bankart repair with capsulorrhaphy
. Coracoid transfer (Latarjet procedure)
. Arthroscopic superior capsule reconstruction
. Iliac crest bone grafting of the humeral head

Correct Answer & Explanation

. Coracoid transfer (Latarjet procedure)


Explanation

In a young, contact athlete with critical glenoid bone loss (typically defined as >20-25%) and recurrent instability, the Latarjet procedure (coracoid transfer) is the gold standard. It provides a 'triple block' effect (bone block, sling effect of the conjoint tendon, and capsular repair). Arthroscopic Bankart repair, even with remplissage, has an unacceptably high failure rate in the setting of critical glenoid bone loss.

Question 1751

Topic: Shoulder & Hip Sports

A 21-year-old male hockey player presents with deep anterior groin pain that worsens with prolonged sitting and deep flexion activities. Physical exam is remarkable for a positive flexion, adduction, internal rotation (FADIR) test. Radiographs reveal an alpha angle of 65 degrees and a positive crossover sign. What is the most accurate description of his pathology?

. Isolated Cam impingement
. Isolated Pincer impingement
. Combined Cam and Pincer impingement
. Ischiofemoral impingement
. Subspine impingement

Correct Answer & Explanation

. Combined Cam and Pincer impingement


Explanation

Femoroacetabular impingement (FAI) is typically evaluated radiographically. An elevated alpha angle (>50-55 degrees) is indicative of a Cam lesion, which is an aspherical deformity of the femoral head-neck junction. The crossover sign on an anteroposterior pelvis radiograph indicates focal cranial retroversion of the acetabulum, typical of Pincer impingement. The presence of both findings indicates combined (mixed) FAI, which is the most common clinical presentation.

Question 1752

Topic: Shoulder & Hip Sports

A 25-year-old male undergoes a Latarjet procedure for recurrent anterior shoulder instability with 25% glenoid bone loss. Postoperatively, he presents with profound weakness in elbow flexion and decreased sensation over the lateral aspect of his forearm. Which of the following intraoperative maneuvers most likely caused this neurologic injury?

. Excessive medial retraction of the conjoint tendon
. Placement of screws penetrating the posterior glenoid cortex
. Inferior capsular release at the 6 o'clock position
. Osteotomy of the coracoid process at its base
. Splitting of the subscapularis muscle in line with its fibers

Correct Answer & Explanation

. Excessive medial retraction of the conjoint tendon


Explanation

The patient's presentation of elbow flexion weakness and lateral forearm sensory deficit is classic for a musculocutaneous nerve injury. The musculocutaneous nerve is the most frequently injured nerve during a Latarjet procedure. It typically enters the conjoint tendon 3 to 8 cm distal to the tip of the coracoid. Excessive medial and distal retraction of the conjoint tendon places significant traction on the musculocutaneous nerve, leading to neuropraxia or structural injury. Inferior capsular release endangers the axillary nerve, while posterior screw penetration puts the suprascapular nerve at risk.

Question 1753

Topic: Shoulder & Hip Sports

A 26-year-old male ice hockey player presents with insidious onset right groin pain, worsened by deep flexion and internal rotation. Examination demonstrates a positive FADIR test. Radiographs reveal a prominent bony bump at the anterolateral femoral head-neck junction with an alpha angle of 65 degrees. He undergoes arthroscopic osteochondroplasty for a cam deformity. During the resection of the femoral neck deformity, over-resection of the head-neck junction poses the greatest risk for which of the following complications?

. Avascular necrosis of the femoral head
. Iatrogenic femoral neck fracture
. Heterotopic ossification
. Injury to the lateral femoral cutaneous nerve
. Ischiofemoral impingement

Correct Answer & Explanation

. Iatrogenic femoral neck fracture


Explanation

Arthroscopic osteochondroplasty is indicated for symptomatic cam femoroacetabular impingement (FAI). Over-resection of the cam deformity significantly increases the risk of a postoperative iatrogenic femoral neck fracture. Biomechanical studies recommend resecting no more than 30% of the anterolateral femoral neck diameter to maintain structural integrity. Avascular necrosis is primarily a risk if the retinacular vessels (branches of the medial femoral circumflex artery) are damaged, which are located more posterosuperiorly, not typically at the primary site of anterolateral cam resection.

Question 1754

Topic: Shoulder & Hip Sports

A 24-year-old hockey player presents with persistent anterior groin pain exacerbated by hip flexion.

An AP pelvis radiograph reveals a prominent 'crossover sign'. What is the primary pathomorphology associated with this radiographic finding?

. Decreased femoral head-neck offset
. Acetabular retroversion
. Coxa profunda
. Acetabular protrusion
. Coxa vara

Correct Answer & Explanation

. Acetabular retroversion


Explanation

The crossover sign on an AP pelvis radiograph indicates acetabular retroversion, where the anterior wall projects more laterally than the posterior wall in the cranial aspect of the joint. This finding is a hallmark of pincer-type femoroacetabular impingement (FAI).

Question 1755

Topic: Shoulder & Hip Sports

A 22-year-old elite hockey player presents with chronic, activity-limiting groin pain. An AP pelvis radiograph demonstrates a "crossover sign" and projection of the ischial spine into the pelvic basin. These radiographic findings are most indicative of which pathology?

. Cam-type femoroacetabular impingement
. Acetabular retroversion causing pincer-type impingement
. Developmental dysplasia of the hip
. Excessive femoral anteversion
. Avascular necrosis of the femoral head

Correct Answer & Explanation

. Acetabular retroversion causing pincer-type impingement


Explanation

The crossover sign (anterior wall crossing lateral to the posterior wall) and the ischial spine sign (visibility of the ischial spine inside the pelvic ring on an AP radiograph) are classic radiographic indicators of focal or global acetabular retroversion, causing pincer-type femoroacetabular impingement.

Question 1756

Topic: Shoulder & Hip Sports

A 24-year-old male athlete presents with deep anterior groin pain exacerbated by hip flexion and internal rotation. An AP pelvis radiograph demonstrates a crossover sign and a prominent ischial spine sign. The alpha angle on the lateral view is 45 degrees. These radiographic findings are most consistent with which of the following pathomorphologies?

. Cam femoroacetabular impingement
. Pincer impingement due to acetabular retroversion
. Pincer impingement due to coxa profunda
. Developmental dysplasia of the hip
. Slipped capital femoral epiphysis

Correct Answer & Explanation

. Pincer impingement due to acetabular retroversion


Explanation

The crossover sign (where the anterior wall of the acetabulum crosses the posterior wall) and a prominent ischial spine sign are classic radiographic features of acetabular retroversion. Acetabular retroversion leads to focal anterior overcoverage of the femoral head, causing Pincer-type femoroacetabular impingement (FAI). An alpha angle of 45 degrees is normal (<50-55 degrees), making Cam impingement unlikely. Coxa profunda is characterized by the acetabular fossa medial to the ilioischial line.

Question 1757

Topic: Shoulder & Hip Sports

A 28-year-old professional hockey player reports deep anterior groin pain that is exacerbated by hip flexion and internal rotation. An anteroposterior radiograph of the pelvis demonstrates a 'crossover sign'.

What is the primary pathophysiologic mechanism responsible for this patient's condition?

. Aspherical contour of the femoral head-neck junction causing cam impingement
. Focal retroversion of the acetabulum causing pincer impingement
. Global excessive anteversion of the acetabulum
. Coxa profunda with medialization of the joint center
. Excessive femoral anteversion

Correct Answer & Explanation

. Focal retroversion of the acetabulum causing pincer impingement


Explanation

A 'crossover sign' on an AP pelvis radiograph indicates that the anterior wall of the acetabulum crosses over the posterior wall before reaching the lateral edge of the acetabular roof. This radiographic finding is pathognomonic for focal or global acetabular retroversion, which leads to pincer-type femoroacetabular impingement (FAI) due to anterior overcoverage of the femoral head.

Question 1758

Topic: Shoulder & Hip Sports

A 24-year-old collegiate hockey player presents with chronic anterior groin pain exacerbated by hip flexion and internal rotation. Anteroposterior pelvis radiographs reveal a prominent crossover sign and an ischial spine sign. Which of the following best describes the pathomorphology contributing to this patient's impingement?

. Decreased femoral head-neck offset
. Acetabular retroversion
. Coxa vara
. Global acetabular overcoverage (Coxa profunda)
. An alpha angle greater than 55 degrees

Correct Answer & Explanation

. Acetabular retroversion


Explanation

The crossover sign (where the anterior rim of the acetabulum crosses the posterior rim on an AP pelvis radiograph) and the ischial spine sign (visibility of the ischial spines medial to the pelvic brim) are classic radiographic indicators of acetabular retroversion. This structural abnormality causes pincer-type femoroacetabular impingement (FAI). An alpha angle >55 degrees and decreased head-neck offset are indicative of cam-type impingement.

Question 1759

Topic: Shoulder & Hip Sports
Following an arthroscopic rotator cuff repair, healing of the tendon to the greater tuberosity footprint progresses through several specific histologic zones to minimize stress concentrations at the interface. Which of the following histologic zones directly connects the unmineralized fibrocartilage to the underlying subchondral bone?
. Tendon proper
. Sharpey's fibers
. Mineralized fibrocartilage
. Tidemark
. Woven bone

Correct Answer & Explanation

. Mineralized fibrocartilage


Explanation

The direct insertion of a tendon to bone (enthesis), such as the rotator cuff footprint, consists of four distinct transitional zones designed to gradually transmit mechanical forces: 1) Tendon proper (Type I collagen), 2) Unmineralized fibrocartilage (Type II and III collagen), 3) Mineralized fibrocartilage (Type II and X collagen), and 4) Bone (Type I collagen). The mineralized fibrocartilage zone directly connects the unmineralized fibrocartilage to the underlying bone. The tidemark is the basophilic line that visually separates the unmineralized and mineralized fibrocartilage zones.

Question 1760

Topic: Shoulder & Hip Sports

A 22-year-old professional rugby player presents with recurrent anterior shoulder instability. Advanced imaging reveals a bony Bankart lesion with 28% glenoid bone loss and an engaging Hill-Sachs lesion. What is the most appropriate surgical management for this patient to prevent recurrent dislocation?

. Arthroscopic Bankart repair with capsulorrhaphy
. Open Bankart repair
. Arthroscopic Remplissage without labral repair
. Latarjet procedure (coracoid transfer)
. Thermal capsulorrhaphy

Correct Answer & Explanation

. Latarjet procedure (coracoid transfer)


Explanation

Critical glenoid bone loss (typically defined as >20-25%) in a contact athlete with recurrent instability dictates the need for a bony augmentation procedure. Soft-tissue repairs (arthroscopic or open Bankart) have an unacceptably high failure rate in the setting of critical bone loss and an engaging Hill-Sachs lesion. The Latarjet procedure (coracoid transfer) extends the glenoid arc and provides a "sling" effect from the conjoint tendon, making it the standard of care for this clinical scenario.