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 581
Topic: 5. Sports Medicine
A 22-year-old athlete undergoes anterior cruciate ligament (ACL) reconstruction using a bone-patellar tendon-bone (BPTB) autograft. Compared to hamstring autografts, what is the most common complication specifically associated with the BPTB graft type?
Correct Answer & Explanation
. Anterior knee pain
Explanation
Bone-patellar tendon-bone (BPTB) autografts provide excellent initial fixation and bone-to-bone healing. However, they are most frequently associated with donor site morbidity, particularly anterior knee pain and kneeling pain.
Question 582
Topic: Shoulder & Hip Sports
A 20-year-old swimmer presents with recurrent anterior shoulder instability. An MRI arthrogram demonstrates an anterior labroligamentous avulsion where the anterior scapular periosteum remains intact but is stripped medially. Which lesion does this describe?
Correct Answer & Explanation
. ALPSA lesion
Explanation
An ALPSA (Anterior Labroligamentous Periosteal Sleeve Avulsion) lesion occurs when the labrum is avulsed but the anterior scapular periosteum remains intact, allowing the labrum to heal in a displaced, medialized position.
Question 583
Topic: Shoulder & Hip Sports
A 60-year-old patient undergoes an arthroscopic rotator cuff repair for a massive crescent-shaped tear. Biomechanically, what is the primary advantage of utilizing a double-row repair construct compared to a single-row repair?
Correct Answer & Explanation
. Increased pressurized footprint contact area
Explanation
Double-row rotator cuff repairs biomechanically provide a significantly larger and more pressurized contact area between the tendon and the tuberosity footprint. This promotes superior biologic healing rates compared to single-row constructs.
Question 584
Topic: Shoulder & Hip Sports
A 28-year-old male with recurrent anterior shoulder instability is found to have a Hill-Sachs lesion on MRI. Which of the following best describes the anatomic nature of this lesion?
Correct Answer & Explanation
. A compression fracture of the posterolateral aspect of the humeral head
Explanation
A Hill-Sachs lesion is an impaction fracture of the posterolateral humeral head. It is created when the humeral head strikes the sharp anterior glenoid rim during an anterior glenohumeral dislocation.
Question 585
Topic: 5. Sports Medicine
A 25-year-old female undergoes anterior cruciate ligament (ACL) reconstruction using a bone-patellar tendon-bone (BPTB) autograft. Which of the following is the most commonly reported complication associated with this specific graft choice when compared to hamstring autograft?
Correct Answer & Explanation
. Anterior knee pain
Explanation
BPTB autografts are historically associated with a higher incidence of donor-site morbidity, specifically anterior knee pain and pain with kneeling, compared to hamstring autografts. Rates of graft rupture and stability are generally comparable or slightly favor BPTB.
Question 586
Topic: 5. Sports Medicine
The main 3-4 viewing portal for wrist arthroscopy lies in between which two tendons?
Correct Answer & Explanation
. EPL and EDC
Explanation
The 3-4 portal is the main viewing portal and is located between the third and fourth compartment. This portal is bordered by the extensor digitorum communis (EDC) to the index finger, and the extensor pollicis longus (EPL) can be palpated in the "soft spot" 1 cm distal to Lister's tubercle. This portal is usually the first portal to be made during wrist arthroscopy.
Question 587
Topic: 5. Sports Medicine
C omplications after wrist arthroscopy occur in what percentage of patients:
Correct Answer & Explanation
. 5%
Explanation
The complication rate after routine wrist arthroscopy is between 2% and 5%.
Question 588
Topic: 5. Sports Medicine
A 24-year-old athlete undergoes posterior cruciate ligament (PCL) reconstruction. The surgeon must understand the biomechanics of the PCL's two primary bundles. Which bundle is most taut in knee flexion?
Correct Answer & Explanation
. Anterolateral bundle
Explanation
The PCL is composed of two main bundles: the anterolateral (AL) and posteromedial (PM) bundles. The larger AL bundle is taut in flexion and lax in extension, whereas the PM bundle is taut in extension.
Question 589
Topic: Knee Sports
In an anterior cruciate ligament (ACL) reconstruction, positioning the femoral tunnel is critical for restoring rotational stability. For a right knee, placing the tunnel at which clock face position optimally mimics the native anatomical footprint?
Correct Answer & Explanation
. 10 o'clock
Explanation
For a right knee, placing the femoral tunnel at the 10 o'clock position (or 2 o'clock for a left knee) optimally addresses the native ACL footprint. Vertical placement at 12 o'clock restores AP stability but fails to control rotational translation.
Question 590
Topic: 5. Sports Medicine
A 24-year-old athlete undergoes a posterolateral corner (PLC) reconstruction of the knee utilizing a fibular-based technique. The surgeon isolates a nerve that winds posterior to the biceps femoris tendon. A motor deficit resulting from injury to this specific nerve would manifest primarily as weakness in which muscle?
Correct Answer & Explanation
. Tibialis anterior
Explanation
The common peroneal nerve lies posterior to the biceps femoris tendon and wraps around the fibular neck. Injury to it affects the deep peroneal nerve, leading to weakness in the tibialis anterior and resulting in foot drop.
Question 591
Topic: 5. Sports Medicine
A 29-year-old man with a remote history of wrist trauma and chronic pain presents with a palpable clunk on radio-ulnar deviation of the wrist. The most sensitive technique for identifying a scapholunate injury is:
Correct Answer & Explanation
. Arthroscopy
Explanation
Magnetic resonance imaging is commonly used among patients with concern for ligamentous injuries of the wrist, particularly in the presence of an abnormal physical exam when plain radiographs are normal. However, the sensitivity of MRI has been shown to be less than 40% in comparison with arthroscopy. Arthroscopy has become the gold standard for the diagnosis of ligamentous injuries to the wrist. A classification scheme has been proposed based on both radiocarpal and midcarpal arthroscopic findings.
Question 592
Topic: Shoulder & Hip Sports
A 26-year-old professional volleyball player presents with insidious onset of posterior shoulder pain and isolated, profound weakness in external rotation. MRI reveals a paralabral cyst. In which anatomical location is the cyst most likely compressing the suprascapular nerve?
Correct Answer & Explanation
. Spinoglenoid notch
Explanation
Compression of the suprascapular nerve at the spinoglenoid notch affects only the branch to the infraspinatus, leading to isolated external rotation weakness. Compression at the suprascapular notch would also involve the supraspinatus, causing weakness in forward elevation.
Question 593
Topic: Shoulder & Hip Sports
A 15-year-old boy presented with inability to elevate his right shoulder and flex his elbow. He sustained a fall from an all-terrain vehicle 8 weeks ago. He landed on the right shoulder and twisted his neck. Radiographs of the skull, chest, cervical and thoracic spine, and shoulder were normal. There was no loss of consciousness, chest pain, or breathing difficulties. The patient was observed in the hospital until stable and referred for follow-up in the hand clinic at 4 weeks. An electromyelogram (EMG) was scheduled. Clinical examination revealed weakness of deltoid, supraspinatus, infraspinatus, teres minor, biceps, brachialis, brachioradialis, and extensor carpi radialis longus. The remainder of his forearm musculature was preserved and he could grasp, release, and pinch. Sensations were decreased along the distribution of the axillary nerve. There was 3 cm wasting of his arm and 2 cm of the forearm. Tinel's sign is positive around the clavicle. Horner's signs are absent and his arm lies against the body. The EMG report showed fibrillation potentials in the weak muscles. The patient can now flex his elbow. When asked to demonstrate, he flexes his wrist and pronates his forearm to swing his elbow into flexion. The least helpful test in further management of this patient is:
Correct Answer & Explanation
. Careful neurological examination
Explanation
Computed tomography scan of the cervical spine will not show the pseudomeningoceles nor provide any information on brachial plexus. Computed tomography may be needed in case of a suspected neck injury but does not form part of a brachial plexus work up.
Question 594
Topic: Shoulder & Hip Sports
A 15-year-old boy presented with inability to elevate his right shoulder and flex his elbow. He sustained a fall from an all-terrain vehicle 8 weeks ago. He landed on the right shoulder and twisted his neck. Radiographs of the skull, chest, cervical and thoracic spine, and shoulder were normal. There was no loss of consciousness, chest pain, or breathing difficulties. The patient was observed in the hospital until stable and referred for follow-up in the hand clinic at 4 weeks. An electromyelogram (EMG) was scheduled. Clinical examination revealed weakness of deltoid, supraspinatus, infraspinatus, teres minor, biceps, brachialis, brachioradialis, and extensor carpi radialis longus. The remainder of his forearm musculature was preserved and he could grasp, release, and pinch. Sensations were decreased along the distribution of the axillary nerve. There was 3 cm wasting of his arm and 2 cm of the forearm. Tinel's sign is positive around the clavicle. Horner's signs are absent and his arm lies against the body. The EMG report showed fibrillation potentials in the weak muscles. The patient can now flex his elbow. When asked to demonstrate, he flexes his wrist and pronates his forearm to swing his elbow into flexion. The most important indication for early exploration in this patient is:
Correct Answer & Explanation
. Absence of biceps function with return of extensor carpi radialis longus (ECRL) power at 4 months
Explanation
An important indication for early exploration is the recovery of a distally supplied muscle, ECRL C6, in the absence of a proximally supplied muscle, biceps C5. Trick movements are adaptive movements employed by the patient by recruiting other muscles, for example, the use of flexor-pronator as elbow flexors in this patient. Bony deformity is a late sequelae and biceps recovery at 3 months is important in obstetric brachial palsy.
Question 595
Topic: 5. Sports Medicine
A 25-year-old overhead athlete presents with deep shoulder pain. MR arthrogram reveals a type II SLAP tear. During arthroscopy, a "peel-back" lesion is noted. This mechanism primarily involves which force applied to the biceps anchor during the late cocking phase of throwing?
Correct Answer & Explanation
. Torsional
Explanation
The "peel-back" mechanism occurs during the late cocking phase of throwing when the shoulder is maximally abducted and externally rotated. This places a torsional force on the biceps root, causing it to peel back from the posterior superior glenoid.
Question 596
Topic: 5. Sports Medicine
When comparing bone-patellar tendon-bone (BPTB) autograft to hamstring autograft for anterior cruciate ligament (ACL) reconstruction, which of the following is a recognized disadvantage of the BPTB graft?
Correct Answer & Explanation
. Increased incidence of anterior knee pain
Explanation
A primary disadvantage of the BPTB autograft is donor site morbidity, particularly anterior knee pain and pain with kneeling. BPTB offers excellent initial fixation and faster bone-to-bone healing compared to soft tissue grafts.
Question 597
Topic: Shoulder & Hip Sports
A 4-month-old infant with obstetric brachial plexus palsy presents with an internal rotation contracture of the shoulder and complete absence of active biceps function. Wrist extension is also absent. What is the most appropriate next step in management?
Correct Answer & Explanation
. Immediate nerve exploration and reconstruction
Explanation
The absolute absence of biceps recovery by 3 to 4 months of age in obstetric brachial plexus palsy is a widely accepted surgical indication for nerve exploration. Delaying microsurgical reconstruction beyond this period leads to significantly poorer functional motor recovery.
Question 598
Topic: Shoulder & Hip Sports
A 40-year-old male presents with sudden, severe, unprovoked right shoulder pain lasting for 2 weeks. As the pain subsides, he notices profound weakness in shoulder abduction and external rotation. EMG demonstrates denervation potentials in the supraspinatus and infraspinatus muscles. What is the most likely diagnosis?
Correct Answer & Explanation
. Parsonage-Turner syndrome
Explanation
Parsonage-Turner syndrome (acute brachial neuritis) classically presents with an initial phase of severe shoulder girdle pain followed by patchy muscle weakness and atrophy as the pain abates. It most commonly affects the suprascapular nerve, long thoracic nerve, or axillary nerve, and is primarily treated conservatively.
Question 599
Topic: Shoulder & Hip Sports
A 32-year-old professional volleyball player presents with an insidious onset of posterior shoulder pain and progressive weakness in external rotation. Clinical examination shows isolated atrophy of the infraspinatus muscle with a completely normal supraspinatus muscle bulk and strength. Where is the most likely site of nerve compression?
Correct Answer & Explanation
. Spinoglenoid notch
Explanation
Compression of the suprascapular nerve at the spinoglenoid notch affects only the distal branch that supplies the infraspinatus, leading to isolated infraspinatus weakness. Conversely, compression at the suprascapular notch would affect both the supraspinatus and infraspinatus muscles.
Question 600
Topic: 5. Sports Medicine
In cases of subacute scaphoid-lunate ligament injury with no arthrosis, all of the following are acceptable options except:
Correct Answer & Explanation
. Scaphotrapeziotrapezoid (STT) fusion
Explanation
In cases of subacute scaphoid-lunate ligament injury without arthrosis, it is acceptable to attempt reconstruction with bone anchors, allograft ligament repair, capsulodesis, bone-ligament-bone autograft, and the RASL procedure with a Herbert screw. In the presence of localized arthritis, one might consider one of the limited wrist fusions such as scaphotrapeziotrapezoid fusion.
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