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Question 5061

Topic: Shoulder & Hip Sports

A 55-year-old man presents with chronic shoulder weakness. MRI demonstrates a massive, retracted tear of the supraspinatus and infraspinatus tendons. Fatty infiltration is Goutallier grade 3. Electromyography reveals denervation of the infraspinatus. What is the most likely anatomic cause of this neurologic finding?

. Traction on the suprascapular nerve at the spinoglenoid notch
. Compression of the axillary nerve at the quadrilateral space
. Traction on the suprascapular nerve at the suprascapular notch
. Compression of the spinal accessory nerve
. Traction of the musculocutaneous nerve

Correct Answer & Explanation

. Traction on the suprascapular nerve at the suprascapular notch


Explanation

Retraction of massive posterosuperior rotator cuff tears alters the course of the suprascapular nerve, often tethering or applying traction to it at the suprascapular notch, leading to neuropathy.

Question 5062

Topic: Knee Sports

A 28-year-old man sustains a direct blow to the anteromedial aspect of his proximal tibia while his knee is flexed. Physical examination demonstrates a positive posterior drawer test. The dial test shows 15 degrees of increased external rotation at 30 degrees of knee flexion compared to the contralateral side, but symmetric external rotation at 90 degrees. What is the most likely diagnosis?

. Isolated PCL tear
. Isolated posterolateral corner (PLC) injury
. Combined PCL and PLC injury
. Combined ACL and PLC injury
. Isolated MCL tear

Correct Answer & Explanation

. Isolated posterolateral corner (PLC) injury


Explanation

Increased external rotation on the dial test at 30 degrees of flexion, which normalizes at 90 degrees, indicates an isolated posterolateral corner (PLC) injury. Combined PCL and PLC injuries show increased external rotation at both angles.

Question 5063

Topic: 5. Sports Medicine

A 22-year-old collegiate soccer player undergoes anterior cruciate ligament reconstruction using a bone-patellar tendon-bone autograft. Compared to a quadrupled hamstring autograft, which of the following is a recognized biomechanical advantage or characteristic of this graft choice?

. Higher ultimate failure load
. Greater cross-sectional area
. Bone-to-bone healing within the tunnels
. Lower incidence of anterior knee pain
. Increased postoperative knee flexor strength

Correct Answer & Explanation

. Higher ultimate failure load


Explanation

Bone-patellar tendon-bone (BTB) autograft allows for bone-to-bone healing in the osseous tunnels, typically at 6 weeks, which is faster than soft tissue healing. Quadrupled hamstring grafts generally possess a higher ultimate failure load and cross-sectional area compared to 10-mm BTB grafts.

Question 5064

Topic: 5. Sports Medicine

A 24-year-old professional baseball pitcher complains of vague posterior shoulder pain and a decrease in pitching velocity. On physical examination, he has 15 degrees of internal rotation and 125 degrees of external rotation at 90 degrees of abduction. Which of the following is the most appropriate initial management?

. Arthroscopic posterior capsular release
. Superior labral repair
. Sleeper stretch program focusing on the posterior capsule
. Anterior capsulolabral plication
. Biceps tenodesis

Correct Answer & Explanation

. Sleeper stretch program focusing on the posterior capsule


Explanation

This patient presents with glenohumeral internal rotation deficit (GIRD) caused by posterior capsular contracture, commonly seen in overhead throwing athletes. The initial treatment of choice is a targeted physical therapy program emphasizing sleeper stretches to stretch the posterior capsule.

Question 5065

Topic: Knee Sports

A 16-year-old female experiences recurrent patellar dislocations. Imaging reveals a tibial tubercle-trochlear groove (TT-TG) distance of 14 mm, a normal Caton-Deschamps index, and a shallow trochlea. What is the primary soft-tissue restraint to lateral patellar translation at 20 degrees of knee flexion that should be reconstructed in this patient?

. Medial patellofemoral ligament (MPFL)
. Medial patellotibial ligament (MPTL)
. Medial collateral ligament (MCL)
. Vastus medialis obliquus (VMO)
. Lateral retinaculum

Correct Answer & Explanation

. Medial patellofemoral ligament (MPFL)


Explanation

The medial patellofemoral ligament (MPFL) provides approximately 50% to 60% of the restraining force against lateral patellar translation from 0 to 30 degrees of knee flexion. Because her TT-TG distance is normal (<20 mm) and patellar height is normal, an isolated MPFL reconstruction is indicated.

Question 5066

Topic: Shoulder & Hip Sports

A 23-year-old rugby player presents with recurrent anterior shoulder instability. CT scan with 3D reconstruction reveals 28% glenoid bone loss. He is planned for a Latarjet procedure. Which of the following best describes the "sling effect" contributing to anterior stability in this procedure?

. The conjoint tendon reinforcing the inferior capsule when the arm is abducted and externally rotated
. The subscapularis muscle acting as a superior dynamic depressor
. The coracoacromial ligament transposed to the greater tuberosity
. The pectoralis minor tendon tensioning the anterior capsule
. The osseous bone block increasing the articular arc length

Correct Answer & Explanation

. The conjoint tendon reinforcing the inferior capsule when the arm is abducted and externally rotated


Explanation

The Latarjet procedure provides stability via the bone block, capsular repair to the coracoacromial ligament stump, and the dynamic sling effect. The sling effect is produced by the conjoint tendon compressing the inferior capsule and subscapularis when the arm is abducted and externally rotated.

Question 5067

Topic: 5. Sports Medicine

A 35-year-old recreational athlete sustains an acute closed midsubstance Achilles tendon rupture. He opts for nonoperative management. Which of the following rehabilitation protocols has been shown to result in re-rupture rates comparable to operative management?

. Cast immobilization in equinus for 8 weeks followed by physical therapy
. Early functional rehabilitation with immediate weight-bearing in a functional brace
. Strict non-weight-bearing in a neutral cast for 6 weeks
. Immobilization in a short leg cast in dorsiflexion for 4 weeks
. Surgical repair is the only method to achieve acceptable re-rupture rates

Correct Answer & Explanation

. Early functional rehabilitation with immediate weight-bearing in a functional brace


Explanation

High-quality randomized controlled trials and meta-analyses have shown that nonoperative management with early functional rehabilitation yields re-rupture rates similar to operative repair. It also avoids the surgical risks of infection and wound breakdown.

Question 5068

Topic: 5. Sports Medicine

A 14-year-old boy presents with vague anterior knee pain. Radiographs reveal a 1.5 cm osteochondritis dissecans (OCD) lesion on the lateral aspect of the medial femoral condyle. His physes are open. MRI shows no fluid behind the lesion. What is the most appropriate initial management?

. Diagnostic arthroscopy and drilling of the lesion
. Fixation with bioabsorbable screws
. Osteochondral autograft transfer
. Activity modification and protected weight-bearing
. Microfracture of the lesion

Correct Answer & Explanation

. Activity modification and protected weight-bearing


Explanation

Juvenile OCD lesions (open physes) that are stable (no fluid behind the lesion on MRI) have a high rate of spontaneous healing with nonoperative management. Activity modification, including cessation of sports and protected weight-bearing, is the most appropriate initial treatment.

Question 5069

Topic: 5. Sports Medicine

A 21-year-old collegiate baseball pitcher has persistent deep shoulder pain during the late cocking phase of throwing despite 3 months of conservative management. MR arthrogram reveals a Type II SLAP tear. During arthroscopy, a Type II SLAP lesion is confirmed. What is the most appropriate surgical management for this overhead athlete?

. Biceps tenodesis
. Biceps tenotomy
. SLAP repair with suture anchors
. Debridement of the superior labrum only
. Coracoacromial ligament transfer

Correct Answer & Explanation

. SLAP repair with suture anchors


Explanation

In young, high-demand overhead throwing athletes with a Type II SLAP tear, primary repair with suture anchors remains the standard of care to restore the native anatomy and tension of the biceps anchor. Biceps tenodesis is typically reserved for older patients or those who fail primary repair.

Question 5070

Topic: Shoulder & Hip Sports

A 25-year-old hockey player presents with chronic anterior groin pain exacerbated by hip flexion and internal rotation. Radiographs demonstrate an alpha angle of 65 degrees on the Dunn lateral view and normal acetabular version. This condition is most strongly associated with the development of which intra-articular pathology?

. Anterosuperior labral tears and adjacent chondral delamination
. Posteroinferior labral tears and pincer-type lesions
. Ligamentum teres hypertrophy
. Avascular necrosis of the femoral head
. Iliopsoas tendon snapping

Correct Answer & Explanation

. Anterosuperior labral tears and adjacent chondral delamination


Explanation

Cam impingement, characterized by an increased alpha angle (>50-55 degrees) and loss of femoral head-neck offset, results in shear forces on the anterosuperior acetabular rim during flexion. This classically leads to anterosuperior labral tears and outside-in chondral delamination.

Question 5071

Topic: Shoulder & Hip Sports

On an AP pelvis radiograph of a 30-year-old woman with hip pain, the anterior wall of the acetabulum is seen crossing over the posterior wall before reaching the lateral edge of the sourcil. This radiographic finding is indicative of:

. Cam morphology
. Acetabular retroversion
. Coxa profunda
. Protrusio acetabuli
. Femoral retroversion

Correct Answer & Explanation

. Acetabular retroversion


Explanation

The "crossover sign" occurs when the anterior wall line crosses lateral to the posterior wall line on a true AP pelvis radiograph. This indicates acetabular retroversion, a common cause of focal anterior pincer-type femoroacetabular impingement.

Question 5072

Topic: 5. Sports Medicine

A 42-year-old tennis player undergoes shoulder arthroscopy for impingement symptoms. Diagnostic arthroscopy reveals a partial articular-sided supraspinatus tendon avulsion (PASTA) involving 60% of the tendon thickness. What is the most widely accepted surgical management for this lesion?

. Debridement alone without repair
. Biceps tenodesis
. Subacromial decompression only
. Transtendon repair or tear completion followed by repair
. Superior capsular reconstruction

Correct Answer & Explanation

. Transtendon repair or tear completion followed by repair


Explanation

High-grade partial articular-sided rotator cuff tears (>50% tendon thickness) generally warrant surgical repair in active patients. This can be accomplished via a transtendon repair or by completing the tear to a full-thickness defect and performing a standard repair.

Question 5073

Topic: 5. Sports Medicine

A 21-year-old collegiate soccer player undergoes anterior cruciate ligament (ACL) reconstruction using a bone-patellar tendon-bone autograft. Which of the following is a recognized biomechanical or biological advantage of this graft choice compared to a quadrupled hamstring autograft at the time of initial healing?

. Faster biologic incorporation at the tunnel aperture
. Higher initial ultimate tensile load to failure
. Increased hamstring strength postoperatively
. Lower rate of post-traumatic osteoarthritis
. Larger graft cross-sectional area

Correct Answer & Explanation

. Faster biologic incorporation at the tunnel aperture


Explanation

Bone-patellar tendon-bone (BPTB) autografts undergo bone-to-bone healing, providing faster biologic incorporation (typically 6 weeks) at the tunnel apertures compared to soft tissue grafts. Hamstring grafts generally have a higher initial ultimate tensile load.

Question 5074

Topic: 5. Sports Medicine

A 35-year-old recreational baseball pitcher has a symptomatic Type II SLAP tear that has failed conservative management. He opts for an arthroscopic SLAP repair. What is the most common post-operative complication of this procedure?

. Recurrent anterior instability
. Deep surgical site infection
. Spontaneous biceps tendon rupture
. Axillary nerve neurapraxia
. Postoperative stiffness and loss of external rotation

Correct Answer & Explanation

. Postoperative stiffness and loss of external rotation


Explanation

Postoperative stiffness, particularly a loss of external rotation, is the most common complication following arthroscopic SLAP repair. Due to this risk, many surgeons now prefer primary biceps tenodesis for older or non-overhead athletes.

Question 5075

Topic: Knee Sports

A 16-year-old female presents with recurrent lateral patellar instability. Imaging shows a tibial tubercle-trochlear groove (TT-TG) distance of 22 mm, a normal TT-PCL distance, and normal trochlear depth. Which of the following is the most appropriate surgical intervention?

. Isolated medial patellofemoral ligament (MPFL) reconstruction
. Lateral retinacular release
. Trochleoplasty
. MPFL reconstruction combined with medializing tibial tubercle osteotomy
. Distal femoral osteotomy

Correct Answer & Explanation

. MPFL reconstruction combined with medializing tibial tubercle osteotomy


Explanation

A TT-TG distance > 20 mm is a recognized risk factor for patellar instability and a primary indication for a medializing tibial tubercle osteotomy. This is typically combined with an MPFL reconstruction to restore the primary soft-tissue restraint.

Question 5076

Topic: Knee Sports
During medial patellofemoral ligament (MPFL) reconstruction, placing the femoral tunnel too proximal will most likely result in which of the following kinematic abnormalities?
. Increased graft tension in extension and laxity in flexion
. Increased graft tension in flexion and laxity in extension
. Patella alta
. Medial patellar subluxation in full extension
. Increased contact pressures on the lateral patellar facet

Correct Answer & Explanation

. Increased graft tension in flexion and laxity in extension


Explanation

Placing the MPFL femoral tunnel too proximal relative to Schรถttle's point causes the graft to tighten excessively as the knee flexes. This leads to a loss of flexion and abnormally high medial patellofemoral cartilage contact pressures.

Question 5077

Topic: Shoulder & Hip Sports

A 45-year-old male undergoes arthroscopic rotator cuff repair for a massive, retracted, U-shaped tear. Margin convergence is performed prior to securing the tendon to the greater tuberosity. What is the primary biomechanical advantage of margin convergence?

. It increases the ultimate tensile strength of the suture anchors
. It decreases strain on the marginal tendon edges at the repair site
. It medializes the footprint to improve the lever arm of the deltoid
. It biologically enhances healing by increasing vascularity
. It completely prevents the risk of recurrent tendon retraction

Correct Answer & Explanation

. It decreases strain on the marginal tendon edges at the repair site


Explanation

Margin convergence closes the posterior and anterior leaves of a U-shaped tear, converting it to a crescent shape. This significantly decreases tension and strain at the free margin of the tendon where it is repaired to the bone footprint.

Question 5078

Topic: Knee Sports

A 22-year-old female collegiate soccer player undergoes anterior cruciate ligament (ACL) reconstruction with a bone-patellar tendon-bone autograft. What is the most common technical error leading to late graft failure?

. Femoral tunnel placed too anteriorly
. Femoral tunnel placed too posteriorly
. Tibial tunnel placed too medially
. Tibial tunnel placed too posteriorly
. Graft tensioned in full flexion

Correct Answer & Explanation

. Femoral tunnel placed too anteriorly


Explanation

The most common technical error in ACL reconstruction is non-anatomic tunnel placement, specifically placing the femoral tunnel too anteriorly. This creates a graft that is tight in flexion and loose in extension, leading to loss of motion and early graft rupture.

Question 5079

Topic: 5. Sports Medicine

During a single-bundle posterior cruciate ligament (PCL) reconstruction using an Achilles tendon allograft, what is the optimal knee position and applied force during graft tensioning to best restore native knee kinematics?

. Full extension with neutral force
. 30 degrees of flexion with a posterior drawer force
. 90 degrees of flexion with an anterior drawer force
. 90 degrees of flexion with a posterior drawer force
. 120 degrees of flexion with neutral force

Correct Answer & Explanation

. 90 degrees of flexion with an anterior drawer force


Explanation

In a single-bundle PCL reconstruction, the graft is classically tensioned at 90 degrees of flexion with an anterior drawer force applied to reduce the anatomic step-off of the medial tibial plateau. This optimally restores the function of the anterolateral bundle.

Question 5080

Topic: Shoulder & Hip Sports

A 24-year-old rugby player presents with recurrent anterior shoulder instability. 3D CT and MRI indicate 22% anterior glenoid bone loss and an engaging, off-track Hill-Sachs lesion. Which of the following surgical interventions is most appropriate to prevent recurrent instability?

. Arthroscopic Bankart repair alone
. Arthroscopic Bankart repair with remplissage
. Open Latarjet procedure
. Open inferior capsular shift
. Putti-Platt procedure

Correct Answer & Explanation

. Open Latarjet procedure


Explanation

The Latarjet procedure (coracoid transfer) is the standard of care for contact athletes with significant anterior glenoid bone loss (typically >15-20%). An arthroscopic Bankart repair alone or with remplissage is inadequate for critical glenoid bone loss.