This practice set contains high-yield board review questions covering key concepts in 5. Sports Medicine. Each clinical scenario is designed to test your diagnostic and management skills relevant to this subspecialty.
Question 6401
Topic: Shoulder & Hip Sports
In rotator cuff tear arthropathy, the massive, irreparable tearing of the supraspinatus and infraspinatus tendons leads to superior migration of the humeral head. This phenomenon is biomechanically attributed to the disruption of which of the following forces?
Correct Answer & Explanation
. Transverse force couple
Explanation
Superior migration of the humeral head in rotator cuff arthropathy is due to the loss of the coronal plane force couple. Normally, the inferior pull of the rotator cuff balances the superior pull of the deltoid; loss of the cuff allows the deltoid to pull the humeral head superiorly against the acromion.
Question 6402
Topic: 5. Sports Medicine
When utilizing massive structural cortical allografts in tumor reconstruction, which method of allograft processing is most detrimental to the graft's biomechanical strength, specifically decreasing its torsional strength?
Correct Answer & Explanation
. Fresh freezing at -80 degrees Celsius
Explanation
High-dose gamma irradiation (typically >25-30 kGy), while effective for sterilization, significantly alters the cross-linking of collagen. This drastically reduces the structural integrity and torsional strength of the cortical allograft.
Question 6403
Topic: Shoulder & Hip Sports
A 22-year-old collegiate rugby player sustains a recurrent anterior shoulder dislocation. A 3D CT scan reveals 25% anterior glenoid bone loss. Which of the following surgical procedures is most appropriate to minimize recurrence?
Correct Answer & Explanation
. Arthroscopic Bankart repair with capsular shift
Explanation
In the setting of significant anterior glenoid bone loss (>20-25%), soft tissue stabilization alone (Bankart repair) has unacceptably high failure rates. A bone-block procedure, such as the Latarjet (coracoid transfer), is indicated to restore the glenoid articular arc and provide a sling effect via the conjoint tendon.
Question 6404
Topic: Shoulder & Hip Sports
A 45-year-old male weightlifter presents with vague posterior shoulder pain and isolated weakness in external rotation. An MRI demonstrates an isolated paralabral cyst in the spinoglenoid notch. Which muscle is most likely to show denervation changes on EMG?
Correct Answer & Explanation
. Supraspinatus
Explanation
A cyst at the spinoglenoid notch compresses the suprascapular nerve after it has already given off motor branches to the supraspinatus, leading to isolated denervation and weakness of the infraspinatus. Entrapment further proximally at the suprascapular notch would affect both the supraspinatus and infraspinatus.
Question 6405
Topic: Shoulder & Hip Sports
A 22-year-old male rugby player presents with recurrent anterior shoulder dislocations. CT imaging with 3D reconstruction reveals a 25% anterior glenoid bone loss. What is the most appropriate surgical management to prevent further recurrences in this high-demand contact athlete?
Correct Answer & Explanation
. Arthroscopic Bankart repair with superior labral repair
Explanation
In patients with recurrent anterior shoulder instability and significant glenoid bone loss (>20-25%), especially high-demand contact athletes, isolated soft tissue stabilization (Bankart repair) has unacceptably high failure rates. The Latarjet procedure (coracoid process transfer) is the gold standard, restoring the glenoid bone track and providing a 'sling effect' from the conjoint tendon.
Question 6406
Topic: Shoulder & Hip Sports
A 13-year-old male baseball pitcher complains of progressive right shoulder pain during the deceleration phase of throwing. Radiographs demonstrate widening and lateral fragmentation of the proximal humeral physis. What is the most appropriate initial management?
Correct Answer & Explanation
. Operative stabilization with smooth K-wires
Explanation
Little Leaguer's shoulder is an epiphysiolysis of the proximal humerus caused by repetitive rotational stress. It is a classic overuse injury in skeletally immature throwers. The mainstay of treatment is absolute cessation of throwing (usually for 3 months) until symptoms resolve and radiographic healing is noted, followed by physical therapy and a gradual return-to-throwing program.
Question 6407
Topic: Shoulder & Hip Sports
A 62-year-old male presents with a massive, irreparable posterosuperior rotator cuff tear with preserved subscapularis function. He has significant external rotation weakness and a positive hornblower's sign. He is not a candidate for reverse total shoulder arthroplasty due to medical comorbidities, but is medically optimized for soft tissue surgery. Which tendon transfer is most appropriate to restore external rotation?
Correct Answer & Explanation
. Pectoralis major transfer
Explanation
Lower trapezius transfer is increasingly preferred for massive irreparable posterosuperior rotator cuff tears to restore external rotation. It has a more favorable line of pull matching the infraspinatus compared to the latissimus dorsi, which requires a significant change in vector. Latissimus dorsi transfers historically have mixed outcomes and lower trapezius transfer with graft augmentation (e.g., Achilles tendon) has shown superior biomechanics for external rotation restoration in modern literature.
Question 6408
Topic: 5. Sports Medicine
A 25-year-old elite overhead throwing athlete presents with deep shoulder pain and a 'dead arm' sensation. An MR arthrogram reveals a Type II SLAP tear. Non-operative management has failed. During arthroscopy, a significant 'peel-back' sign is noted. What is the classic gold standard surgical intervention for this specific patient population?
Correct Answer & Explanation
. Biceps tenodesis to the bicipital groove
Explanation
A Type II SLAP tear involves detachment of the superior labrum and biceps anchor from the superior glenoid. The 'peel-back' sign is characteristic in throwing athletes. In a young, elite overhead throwing athlete, arthroscopic SLAP repair with suture anchors has historically been the gold standard to restore native throwing kinematics, whereas biceps tenodesis is often preferred in older or non-overhead athletes.
Question 6409
Topic: Shoulder & Hip Sports
A 26-year-old elite volleyball player presents with insidious onset, painless weakness of her hitting arm. Examination reveals isolated atrophy and weakness of the infraspinatus with normal supraspinatus strength. An MRI is most likely to show a cyst compressing the nerve at which location?
Correct Answer & Explanation
. Quadrilateral space
Explanation
Compression of the suprascapular nerve at the spinoglenoid notch affects only the infraspinatus muscle. Compression more proximally at the suprascapular notch would denervate both the supraspinatus and infraspinatus.
Question 6410
Topic: Shoulder & Hip Sports
A 48-year-old heavy laborer presents with anterior shoulder pain and clicking. MRI arthrogram reveals a Type II SLAP tear. Conservative management has failed. To optimize his return to heavy labor and minimize postoperative stiffness, what is the best surgical procedure?
Correct Answer & Explanation
. Arthroscopic SLAP repair with suture anchors
Explanation
In older patients or manual laborers with a Type II SLAP tear, primary biceps tenodesis provides more predictable pain relief, a faster return to work, and lower rates of postoperative stiffness compared to SLAP repair.
Question 6411
Topic: Shoulder & Hip Sports
A 40-year-old male experiences a seizure and subsequently complains of shoulder pain with a locked internally rotated arm. Radiographs reveal a "lightbulb" sign on the AP view. What is the most likely associated osseous defect?
Correct Answer & Explanation
. Hill-Sachs lesion
Explanation
Seizures commonly cause posterior shoulder dislocations, recognized by the "lightbulb" sign due to internal rotation of the humeral head. This is frequently associated with an impaction fracture of the anteromedial humeral head, known as a reverse Hill-Sachs lesion.
Question 6412
Topic: Knee Sports
A 24-year-old professional soccer player undergoes ACL reconstruction. During arthroscopy, the surgeon evaluates the posterior compartments using a 70-degree arthroscope through the intercondylar notch. A longitudinal tear at the meniscocapsular junction of the posterior horn of the medial meniscus is identified. This lesion was not clearly visualized on the standard sagittal MRI sequences. What is the most likely biomechanical consequence if this lesion is left untreated?
Correct Answer & Explanation
. Increased anterior tibial translation and rotatory instability
Explanation
The clinical scenario describes a 'ramp lesion', which is a hidden lesion of the posterior horn of the medial meniscus (meniscocapsular junction) commonly associated with ACL tears. If left untreated, ramp lesions significantly increase anterior tibial translation and rotatory instability, leading to higher forces on the ACL graft and an increased risk of graft failure. Unlike root tears, ramp lesions do not completely disrupt the meniscal hoop stresses, so they are not biomechanically equivalent to a total meniscectomy.
Question 6413
Topic: Knee Sports
A 19-year-old female presents with recurrent lateral patellar instability. Imaging reveals a TT-TG distance of 14 mm, normal patellar height, and no significant trochlear dysplasia. She is scheduled for an isolated Medial Patellofemoral Ligament (MPFL) reconstruction. Which of the following best describes the correct anatomic femoral attachment site for the MPFL graft?
Correct Answer & Explanation
. Between the medial epicondyle and the adductor tubercle
Explanation
The anatomic femoral origin of the MPFL is located in a saddle-like depression between the adductor tubercle (which is proximal) and the medial epicondyle (which is distal). Radiographically, this is identified using the Schรถttle point, located approximately 1 mm anterior to the posterior femoral cortical line, 2.5 mm distal to the posterior articular border, and proximal to the level of the posterior medial epicondyle.
Question 6414
Topic: Shoulder & Hip Sports
A 22-year-old rugby player presents with recurrent anterior shoulder dislocations. CT imaging demonstrates 25% anterior glenoid bone loss. A Latarjet procedure is planned. Which of the following provides the primary mechanism of stabilization in the Latarjet procedure at 90 degrees of abduction and external rotation?
Correct Answer & Explanation
. The bony block increasing the glenoid articular arc
Explanation
The Latarjet procedure relies on a 'triple blocking' effect. The sling effect of the conjoint tendon (and subscapularis) acting as a dynamic buttress across the anterior-inferior capsule is the primary stabilizer in the vulnerable abducted/externally rotated position, accounting for 50-70% of the restored stability. The bony block and capsular repair provide the remaining stability.
Question 6415
Topic: Shoulder & Hip Sports
A 62-year-old male presents with a massive, irreparable posterosuperior rotator cuff tear. He has profound weakness in external rotation and a positive external rotation lag sign. His subscapularis is fully intact, and he has active forward elevation to 130 degrees. Which of the following tendon transfers is most classically indicated for this specific pattern of deficit?
Correct Answer & Explanation
. Pectoralis major transfer
Explanation
A latissimus dorsi tendon transfer is classically indicated for younger or active patients with a massive, irreparable posterosuperior rotator cuff tear (supraspinatus and infraspinatus) who have loss of active external rotation but an intact subscapularis and preserved deltoid function. Lower trapezius transfer is also an option, but among the choices, latissimus dorsi transfer is the classic, established procedure for this defect.
Question 6416
Topic: Shoulder & Hip Sports
A 25-year-old ice hockey player is diagnosed with Femoroacetabular Impingement (FAI). Radiographs and MRI demonstrate a prominent Cam lesion with an alpha angle of 68 degrees. In this patient, where is the acetabular cartilage delamination most likely to be located?
Correct Answer & Explanation
. Anterosuperior quadrant
Explanation
Cam-type femoroacetabular impingement is caused by an aspherical femoral head-neck junction (high alpha angle) that forcefully enters the acetabulum during flexion and internal rotation. This creates shear forces that classically cause chondral delamination and labral tears in the anterosuperior quadrant of the acetabulum (from 1 to 3 o'clock position).
Question 6417
Topic: Knee Sports
A 28-year-old skier sustains an isolated complete posterior cruciate ligament (PCL) injury. The PCL consists of two distinct functional bundles. Which statement accurately describes the biomechanics of the PCL bundles?
Correct Answer & Explanation
. The posteromedial bundle is larger and tight in extension
Explanation
The PCL is composed of two main bundles: the anterolateral (AL) and the posteromedial (PM). The AL bundle is the larger and stiffer of the two, and it is tight in flexion. The PM bundle is smaller and is tightest in extension.
Question 6418
Topic: Shoulder & Hip Sports
A 45-year-old construction worker presents with chronic anterior shoulder pain and popping. MRI arthrogram reveals a Type II SLAP tear. Non-operative management has failed. Based on current evidence, which surgical intervention provides the most reliable return to work and clinical outcomes for this specific patient profile?
Correct Answer & Explanation
. Arthroscopic SLAP repair using suture anchors
Explanation
In patients older than 40 years, particularly manual laborers or those with degenerative SLAP tears, biceps tenodesis has consistently shown superior clinical outcomes, lower complication rates, and a more reliable return to work compared to arthroscopic SLAP repair, which carries a high risk of postoperative stiffness and persistent pain in this demographic.
Question 6419
Topic: 5. Sports Medicine
A 14-year-old male with open physes presents with knee pain. MRI reveals a 1.5 cm osteochondral defect (OCD) on the lateral aspect of the medial femoral condyle. The overlying cartilage is intact, and there is no subchondral fluid line indicating instability. What is the most appropriate initial management?
Correct Answer & Explanation
. Arthroscopic transarticular drilling
Explanation
In a skeletally immature patient (open physes) with a stable OCD lesion (intact cartilage, no high signal fluid line behind the lesion on T2 MRI), the initial treatment is non-operative management with activity restriction and protected weight-bearing. This has a high success rate (50-75%) in juvenile patients. Surgery is reserved for failed non-operative management or unstable lesions.
Question 6420
Topic: Shoulder & Hip Sports
A 20-year-old baseball pitcher presents with vague posterior shoulder pain during the late cocking phase of throwing. He exhibits a profound Glenohumeral Internal Rotation Deficit (GIRD). MRI arthrogram shows undersurface fraying of the supraspinatus and a posterosuperior labral tear. Which of the following is the primary pathophysiologic mechanism driving this condition (Internal Impingement)?
Internal impingement in overhead throwing athletes is primarily driven by contracture of the posteroinferior capsule. This contracture leads to a Glenohumeral Internal Rotation Deficit (GIRD) and causes a posterosuperior shift of the humeral head during the late cocking phase (maximum abduction and external rotation). This shift pinches the posterosuperior rotator cuff between the greater tuberosity and the posterosuperior glenoid labrum.
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