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 6061
Topic: 5. Sports Medicine
A 25-year-old elite overhead throwing athlete undergoes arthroscopy for a symptomatic Type II SLAP tear that failed conservative management. What is the pathomechanical basis of this injury during the late cocking phase of throwing?
Correct Answer & Explanation
. Subcoracoid impingement
Explanation
The 'peel-back' mechanism occurs during the late cocking phase of throwing (maximum abduction and external rotation), placing a torsional force on the biceps anchor that dynamically peels the superior labrum off the glenoid rim.
Question 6062
Topic: 5. Sports Medicine
A 22-year-old overhead throwing athlete complains of deep shoulder pain during the late cocking phase of throwing. MR arthrography reveals a Type II Superior Labrum Anterior to Posterior (SLAP) tear. Which of the following best describes the specific anatomical pathology of a Type II SLAP lesion?
Correct Answer & Explanation
. Fraying of the superior labrum with a securely attached biceps anchor
Explanation
A Type II SLAP tear involves detachment of the superior labrum and the biceps anchor from the superior glenoid tubercle. This results in superior labral instability, particularly during the peel-back mechanism in overhead sports.
Question 6063
Topic: Knee Sports
In a cruciate-retaining (CR) total knee arthroplasty, the posterior cruciate ligament (PCL) is preserved. If the PCL is left excessively tight during the procedure, what kinematic abnormality is most likely to occur?
Correct Answer & Explanation
. Excessive anterior rollback of the femur in flexion
Explanation
In a CR TKA, an excessively tight PCL will pull the femur excessively posterior during flexion (excessive posterior rollback), which can lead to limited knee flexion, excessive wear on the posterior aspect of the polyethylene insert, and lift-off of the anterior tibial tray. Paradoxical anterior slide is typically seen when the PCL is deficient or incompetent in a CR knee.
Question 6064
Topic: 5. Sports Medicine
In revision TKA for severe AORI Type 2b or 3 metaphyseal bone defects, highly porous metaphyseal titanium cones are increasingly utilized. What is their primary biomechanical and biologic advantage over standard structural allografts?
Correct Answer & Explanation
. They actively remodel into host cortical bone over a 2-year period.
Explanation
Highly porous titanium metaphyseal cones offer excellent early rigid mechanical stability (often a 'scratch fit' in the metaphysis) and long-term biologic fixation through osteointegration. This overcomes the major limitations of structural bulk allografts, which suffer from nonunion, late resorption, and eventual collapse.
Question 6065
Topic: Shoulder & Hip Sports
A 22-year-old football player sustains recurrent anterior shoulder dislocations. Preoperative imaging
reveals 25% anterior glenoid bone loss. What is the most appropriate surgical intervention to minimize recurrence?
Correct Answer & Explanation
. Arthroscopic Bankart repair
Explanation
In patients with significant anterior glenoid bone loss (>20-25%), isolated soft-tissue procedures (like arthroscopic Bankart repair) have unacceptably high failure rates. The Latarjet procedure (coracoid transfer) addresses the bony defect and provides a sling effect via the conjoint tendon to stabilize the shoulder anteriorly.
Question 6066
Topic: Shoulder & Hip Sports
A 30-year-old elite volleyball player complains of vague posterior shoulder pain and weakness in external rotation. Examination reveals isolated atrophy of the infraspinatus with preserved supraspinatus bulk. Where is the most likely site of nerve compression?
Correct Answer & Explanation
. Suprascapular notch
Explanation
Isolated infraspinatus weakness and atrophy points to compression of the suprascapular nerve at the spinoglenoid notch, frequently caused by ganglion cysts in overhead athletes. Compression more proximally at the suprascapular notch would affect both the supraspinatus and infraspinatus.
Question 6067
Topic: 5. Sports Medicine
During diagnostic arthroscopy on a 26-year-old baseball pitcher, the surgeon identifies a SLAP lesion characterized by a bucket-handle tear of the superior labrum with an intact biceps anchor. What type of SLAP tear is this according to Snyder's classification?
Correct Answer & Explanation
. Type III
Explanation
SLAP tears are classified by Snyder. Type I is fraying of the superior labrum. Type II is detachment of the superior labrum and biceps anchor. Type III is a bucket-handle tear of the superior labrum with an intact biceps anchor. Type IV is a bucket-handle tear extending into the biceps tendon.
Question 6068
Topic: Shoulder & Hip Sports
A 45-year-old male presents to the ED after a generalized tonic-clonic seizure. His shoulder is locked in internal rotation and he is unable to externally rotate. Radiographs show a 'lightbulb' sign. Which of the following associated injuries is most frequently seen in this condition?
Correct Answer & Explanation
. Bankart lesion
Explanation
The patient has a posterior shoulder dislocation, commonly caused by seizures or electrical shocks due to the powerful internal rotators overpowering the external rotators. The 'lightbulb' sign on AP radiograph is classic. The most common associated injury is an impaction fracture of the anteromedial humeral head, known as a reverse Hill-Sachs lesion.
Question 6069
Topic: Shoulder & Hip Sports
A 55-year-old laborer has a massive, irreparable posterosuperior rotator cuff tear. He has an intact subscapularis and a negative hornblower's sign. He struggles primarily with loss of active external rotation and elevation. Which tendon transfer is most historically validated and appropriate for this specific deficit pattern?
Correct Answer & Explanation
. Pectoralis major transfer
Explanation
The latissimus dorsi tendon transfer is traditionally indicated for irreparable posterosuperior rotator cuff tears (supraspinatus and infraspinatus) in younger, active patients with an intact subscapularis and functioning deltoid. It helps restore external rotation and forward flexion.
Question 6070
Topic: Shoulder & Hip Sports
A 24-year-old professional baseball pitcher presents with posterior shoulder pain during the late cocking phase of throwing. He exhibits a GIRD (glenohumeral internal rotation deficit) of 25 degrees. What is the primary pathophysiologic mechanism of his shoulder pain?
Correct Answer & Explanation
. Subacromial bursitis compressing the supraspinatus
Explanation
Internal impingement typically occurs in overhead athletes during extreme external rotation and abduction (late cocking phase). The articular undersurface of the supraspinatus/infraspinatus tendons is dynamically pinched or impinged against the posterosuperior glenoid rim and labrum.
Question 6071
Topic: Shoulder & Hip Sports
A 55-year-old male sustains an anterior shoulder dislocation. Post-reduction, he has numbness over the lateral aspect of his shoulder and inability to actively abduct his arm. An EMG performed at 3 weeks shows fibrillation potentials in the deltoid. What is the most appropriate management?
Correct Answer & Explanation
. Immediate exploration and sural nerve grafting
Explanation
Axillary nerve neurapraxia or axonotmesis is common after anterior shoulder dislocations, particularly in older patients. Most recover spontaneously. An EMG at 3 weeks showing fibrillations confirms denervation, but clinical recovery can still occur over 3-6 months. Observation and physical therapy to maintain ROM is the initial step; surgical exploration is reserved for failure to improve clinically or electrically by 3-6 months.
Question 6072
Topic: Shoulder & Hip Sports
A 40-year-old male presents with severe, acute-onset right shoulder pain that lasted for two weeks, awakened him from sleep, and has now transitioned into profound weakness of shoulder abduction and external rotation. He reports a recent viral respiratory illness. MRI of the shoulder is unremarkable. What is the most likely diagnosis?
Correct Answer & Explanation
. Acute massive rotator cuff tear
Explanation
Parsonage-Turner syndrome (idiopathic brachial neuritis) classically presents with acute, severe shoulder pain that awakens the patient at night. As the pain subsides over days to weeks, patients develop patchy weakness and atrophy (commonly affecting the upper trunk: deltoid, supraspinatus, infraspinatus). It is often preceded by a viral illness or vaccination. The lack of MRI findings rules out acute structural tears.
Question 6073
Topic: Shoulder & Hip Sports
A 31-year-old male volleyball player presents with insidious onset of right shoulder weakness. Physical exam reveals notable atrophy of the infraspinatus fossa but normal bulk of the supraspinatus. External rotation strength is significantly decreased, while abduction strength is preserved. What is the most likely etiology of this patient's condition?
Correct Answer & Explanation
. A ganglion cyst at the suprascapular notch
Explanation
Isolated infraspinatus atrophy and weakness point to compression of the suprascapular nerve at the spinoglenoid notch. At this location, the nerve has already given off its motor branch to the supraspinatus, so supraspinatus function (abduction) remains intact. This is frequently caused by a ganglion cyst associated with a posterior labral tear. Compression at the suprascapular notch would affect both the supraspinatus and infraspinatus.
Question 6074
Topic: Shoulder & Hip Sports
The Latarjet procedure involves transfer of the coracoid process to the anterior glenoid neck. During the approach, the subscapularis muscle is often split longitudinally. Which nerve is at greatest risk of iatrogenic injury if this split is extended too far medially?
Correct Answer & Explanation
. Axillary nerve
Explanation
During the subscapularis split for a Latarjet or anterior stabilization procedure, the axillary nerve is at risk if the split is extended too far medially. The axillary nerve courses inferior to the capsule and crosses the anterior subscapularis muscle belly medially before entering the quadrilateral space. The musculocutaneous nerve is also at risk during a Latarjet, but primarily during coracoid preparation and retraction of the conjoint tendon.
Question 6075
Topic: Shoulder & Hip Sports
A 55-year-old male presents with a massive, irreparable tear of the subscapularis tendon following a failed repair. He complains of debilitating anterior pain, has a positive belly-press test, and increased passive external rotation. Which tendon transfer is most appropriate to restore anterior shoulder function?
Correct Answer & Explanation
. Latissimus dorsi
Explanation
The pectoralis major transfer is the most commonly utilized and reliable tendon transfer for massive, irreparable subscapularis tears to restore internal rotation and anterior stability. In contrast, latissimus dorsi and lower trapezius transfers are indicated for irreparable posterosuperior rotator cuff tears (supraspinatus and infraspinatus).
Question 6076
Topic: Shoulder & Hip Sports
A 48-year-old manual laborer has a massive, retracted, and fatty-infiltrated tear of the supraspinatus and infraspinatus. He lacks active external rotation and has a positive external rotation lag sign, but has intact subscapularis function and no significant glenohumeral arthritis. Which tendon transfer is most indicated for this patient?
Correct Answer & Explanation
. Pectoralis major transfer
Explanation
A latissimus dorsi (or lower trapezius) tendon transfer is indicated for a young, active patient with an irreparable posterosuperior rotator cuff tear resulting in deficient external rotation and elevation, provided there is no significant glenohumeral arthritis. An intact subscapularis is essential for a successful latissimus dorsi transfer to balance the force couples.
Question 6077
Topic: Shoulder & Hip Sports
A 65-year-old female sustains an anterior shoulder dislocation. After successful closed reduction in the emergency department, post-reduction radiographs reveal a concentric glenohumeral joint but a displaced greater tuberosity fracture with 7 mm of superior displacement. What is the most appropriate management?
Correct Answer & Explanation
. Sling immobilization for 2 weeks followed by physical therapy
Explanation
In the setting of an anterior shoulder dislocation with an associated greater tuberosity fracture, conservative management is typically acceptable if the tuberosity fragment is displaced < 5 mm after reduction. Displacement > 5 mm, especially superior displacement, increases the risk of subacromial impingement and rotator cuff dysfunction, warranting surgical fixation (ORIF or arthroscopic repair).
Question 6078
Topic: Shoulder & Hip Sports
A 40-year-old male presents to the ER after a generalized seizure. He holds his right arm firmly in internal rotation and adduction. Radiographs confirm a posterior glenohumeral dislocation. After closed reduction, a CT scan shows a reverse Hill-Sachs lesion involving 25% of the humeral head articular surface. Which of the following is the most appropriate surgical treatment?
Correct Answer & Explanation
. Arthroscopic posterior Bankart repair alone
Explanation
A reverse Hill-Sachs lesion is an anteromedial impaction fracture of the humeral head resulting from a posterior dislocation. For defects involving 20-40% of the articular surface, transferring the subscapularis tendon (McLaughlin procedure) or the lesser tuberosity with the attached subscapularis (Modified McLaughlin procedure) into the defect is the treatment of choice. This prevents the defect from engaging the posterior glenoid and prevents recurrent instability.
Question 6079
Topic: Shoulder & Hip Sports
In a 65-year-old sedentary patient undergoing arthroscopic rotator cuff repair, a severely frayed and subluxated long head of the biceps tendon is noted. The surgeon decides to perform a biceps tenotomy rather than a tenodesis. Compared to tenodesis, which of the following is the most likely outcome of tenotomy?
Correct Answer & Explanation
. Higher rate of postoperative shoulder stiffness
Explanation
Biceps tenotomy and tenodesis both provide excellent pain relief for pathology of the long head of the biceps. Tenotomy is faster, requires no implants, and allows for an immediate postoperative rehabilitation protocol. However, it is associated with a significantly higher rate of cosmetic "Popeye" deformity (distal migration of the biceps muscle belly) and occasional cramping. Tenodesis minimizes the cosmetic deformity but carries a small risk of implant-related complications and requires a more protected initial rehabilitation.
Question 6080
Topic: Shoulder & Hip Sports
A 22-year-old collegiate baseball pitcher complains of posterior shoulder pain during the late cocking phase of throwing. Physical examination reveals a glenohumeral internal rotation deficit (GIRD) of 25 degrees compared to the contralateral side. Which of the following best describes the pathophysiology of his internal impingement?
Correct Answer & Explanation
. Impingement of the supraspinatus tendon against the coracoacromial ligament
Explanation
Internal impingement typically occurs in overhead athletes during the late cocking phase (abduction and maximal external rotation). It involves the impingement of the undersurface (articular surface) of the posterior supraspinatus and anterior infraspinatus tendons between the greater tuberosity of the humerus and the posterosuperior glenoid labrum.
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