Orthopedic Sports Medic Review | Dr Hutaif Sports Medic -...

Question 1

A 25-year-old professional soccer player undergoes an anterior cruciate ligament (ACL) reconstruction. Preoperative MRI revealed a suspicious fluid signal posterior to the medial meniscus. Intraoperatively, the surgeon suspects a 'ramp lesion'. Which of the following arthroscopic approaches provides the most optimal visualization for accurate diagnosis and repair of this specific lesion?

Explanation

Ramp lesions are longitudinal meniscocapsular separations of the posterior horn of the medial meniscus, often associated with ACL ruptures. They represent a 'hidden lesion' that is frequently missed if the posterior compartments are not specifically evaluated. Viewing through an intercondylar trans-notch approach or utilizing a direct posteromedial portal is essential for accurate diagnosis and subsequent surgical repair.

Question 2

A 22-year-old rugby player presents with recurrent anterior shoulder instability. A 3D CT scan reveals 25% anterior glenoid bone loss. The surgeon plans to perform a Latarjet procedure. Which of the following biomechanical mechanisms is considered the primary stabilizer provided by this procedure when the shoulder is in the abducted and externally rotated position?

Explanation

The Latarjet procedure provides anterior shoulder stability through a 'triple effect'. While the bone block replaces missing glenoid bone, biomechanical studies demonstrate that the 'sling effect' of the transferred conjoint tendon—which supports the inferior subscapularis and anterior capsule when the arm is in abduction and external rotation—is the most significant contributor to preventing anterior translation in the apprehension position.

Question 3

During a double-bundle posterior cruciate ligament (PCL) reconstruction, understanding the reciprocal tension pattern of the native PCL bundles is critical. Which of the following accurately describes the biomechanical behavior of the native PCL bundles during knee motion?

Explanation

The native PCL consists of two primary bundles: the larger anterolateral (AL) bundle and the smaller posteromedial (PM) bundle. Biomechanically, the AL bundle is maximally tight in flexion, whereas the PM bundle is tight in extension. This reciprocal tension pattern must be recreated during a double-bundle PCL reconstruction to restore normal knee kinematics.

Question 4

A 19-year-old female presents with a history of recurrent lateral patellar dislocations. Non-operative management has failed. Advanced imaging demonstrates an intact patellofemoral cartilage profile but reveals an elevated tibial tubercle-trochlear groove (TT-TG) distance. Above what specific TT-TG threshold is a medializing tibial tubercle osteotomy generally indicated?

Explanation

The tibial tubercle-trochlear groove (TT-TG) distance is traditionally measured on axial CT or MRI scans. A normal TT-TG distance is generally considered to be less than 15 mm. A distance of 15-20 mm is borderline, while a distance greater than 20 mm is considered highly abnormal and is a primary indication for an anteromedializing tibial tubercle osteotomy (e.g., Fulkerson osteotomy) to correct the extensor mechanism alignment.

Question 5

A 28-year-old male volleyball player presents with insidious onset of vague posterior shoulder pain and isolated weakness in external rotation. An MRI reveals a paralabral cyst extending posteriorly. Compression of the involved neural structure at which of the following anatomic locations is the most likely cause of his specific physical exam findings?

Explanation

The patient has isolated external rotation weakness, which points to isolated infraspinatus denervation. A paralabral cyst associated with a posterior labral tear frequently decompresses into the spinoglenoid notch. The suprascapular nerve innervates the supraspinatus before passing through the spinoglenoid notch to innervate the infraspinatus. Therefore, compression at the spinoglenoid notch affects only the infraspinatus, whereas compression at the suprascapular notch would affect both the supraspinatus and infraspinatus.

Question 6

A 30-year-old weightlifter feels a sudden 'pop' and tearing sensation in his anterior axillary fold while performing a heavy bench press. He is diagnosed with a pectoralis major tendon rupture. Which of the following accurately describes the anatomic relationship of the pectoralis major tendon at its insertion site?

Explanation

The pectoralis major consists of a clavicular and a sternal head. As the tendinous fibers course laterally toward their insertion on the lateral lip of the bicipital groove, the lower (sternal) fibers twist 180 degrees. Consequently, the sternal head inserts proximal and deep (posterior) relative to the clavicular head. Due to this unique anatomy and tensioning, the sternal head is typically the first to rupture during maximal eccentric loading.

Question 7

A 45-year-old male undergoes a single-incision anterior approach for a distal biceps tendon rupture repair. Postoperatively, he complains of numbness and paresthesia along the radial aspect of his forearm. Which of the following nerves is most commonly at risk and likely injured due to superficial retraction during this specific surgical approach?

Explanation

In a single-incision anterior approach for distal biceps repair, the lateral antebrachial cutaneous nerve (LABCN) is the most frequently injured nerve (typically via neurapraxia from retraction). It runs superficially in the subcutaneous tissue on the lateral aspect of the antecubital fossa. While the posterior interosseous nerve (PIN) is at risk during drilling of the radial tuberosity, LABCN injury is the most common sensory complication of the anterior approach.

Question 8

A 55-year-old female reports a sudden, sharp pain in the back of her knee while descending stairs. MRI of the knee demonstrates a classic 'ghost sign'. This specific radiographic sign is most indicative of which of the following pathologies?

Explanation

The 'ghost sign' is classically seen on sagittal MRI sequences and refers to the absence of the normal low-signal 'bow-tie' appearance of the posterior horn of the meniscus. This is highly indicative of a meniscal root tear. Medial meniscal posterior root tears disrupt circumferential hoop stresses, leading to functional meniscectomy, meniscal extrusion, and rapid progression of unicompartmental osteoarthritis.

Question 9

A 23-year-old collegiate hockey player complains of insidious anterior groin pain that worsens with deep flexion. Physical examination reveals limited internal rotation in flexion, and a positive anterior impingement test. Radiographs show an alpha angle of 68 degrees. In Cam-type femoroacetabular impingement (FAI), the offending osseous deformity is most frequently located at which aspect of the proximal femur?

Explanation

Cam-type femoroacetabular impingement (FAI) is characterized by an aspherical femoral head due to an osseous bump or decreased head-neck offset. This deformity is most commonly located at the anterosuperior aspect of the femoral head-neck junction. During activities involving hip flexion and internal rotation, this non-spherical portion impinges against the anterosuperior acetabular rim, causing labral tears and adjacent chondral delamination.

Question 10

A 30-year-old male presents to the clinic after a hyperextension knee injury. During physical examination, the Dial test reveals 15 degrees of increased external rotation at 30 degrees of knee flexion compared to the contralateral side. However, at 90 degrees of knee flexion, the external rotation is symmetric bilaterally. This clinical finding isolated to 30 degrees of flexion primarily implicates injury to which of the following structures?

Explanation

The Dial test evaluates for posterolateral corner (PLC) and posterior cruciate ligament (PCL) injuries. A positive test (generally defined as >10 degrees of increased external rotation compared to the normal side) at 30 degrees of knee flexion, but symmetric at 90 degrees, indicates an isolated injury to the PLC structures (LCL, popliteus tendon, popliteofibular ligament). If the test is positive at both 30 and 90 degrees, it indicates a combined injury to both the PLC and the PCL.

Question 11

A 42-year-old construction worker sustains a severe direct blow to the superior aspect of his shoulder, resulting in an unstable, completely displaced Type V acromioclavicular (AC) joint separation. The surgeon plans an anatomic reconstruction of the coracoclavicular (CC) ligaments. What is the correct anatomical orientation of the native CC ligaments?

Explanation

The coracoclavicular (CC) ligaments consist of the conoid and trapezoid ligaments. The conoid ligament is cone-shaped and inserts on the conoid tubercle of the clavicle, which is located more medial and posterior (approximately 45 mm from the distal clavicle). The trapezoid ligament is broad and inserts on the trapezoid line of the clavicle, located more lateral and anterior (approximately 25 mm from the distal clavicle).

Question 12

A 35-year-old competitive water skier sustains an acute, complete, three-tendon proximal hamstring avulsion with 4 cm of retraction. Surgical repair is indicated. Which of the following peripheral nerves is anatomically situated closest to the ischial tuberosity footprint and is at the highest risk of iatrogenic injury during deep surgical dissection?

Explanation

The proximal hamstring complex originates from the ischial tuberosity. The sciatic nerve courses immediately lateral (average 1.2 cm) to the lateral border of the ischial tuberosity. In cases of acute avulsion with hematoma, or chronic cases with scar tissue, the normal anatomical planes are distorted, placing the sciatic nerve at extremely high risk of injury during exploration and suture anchor repair of the footprint.

Question 13

A 40-year-old male weekend warrior sustains an acute midsubstance Achilles tendon rupture. He elects to undergo a percutaneous repair to minimize wound complications. The surgeon must be meticulously aware of the sural nerve trajectory during lateral suture placement. What is the typical anatomic course of the sural nerve relative to the Achilles tendon?

Explanation

The sural nerve courses distally in the posterior calf and crosses the lateral border of the Achilles tendon (coursing from lateral to midline/medial relative to the lateral edge) approximately 10 to 12 cm proximal to its insertion on the calcaneus. Because it sits in the subcutaneous tissues closely applied to the lateral/posterolateral aspect of the tendon, it is at high risk of entrapment or laceration during percutaneous or minimally invasive Achilles repair when passing sutures from the lateral side.

Question 14

A 25-year-old professional baseball pitcher presents with posterior shoulder pain. Workup reveals 'internal impingement'. This pathologic process involves the articular surface of the rotator cuff becoming pinched between the greater tuberosity and the posterosuperior glenoid. During which specific phase of the throwing motion does this impingement primarily occur?

Explanation

Internal impingement of the shoulder typically affects overhead athletes. It occurs when the arm is positioned in extreme abduction and external rotation, which happens during the late cocking and early acceleration phases of throwing. In this position, the articular surface of the supraspinatus and anterior infraspinatus tendons gets compressed against the posterosuperior glenoid labrum.

Question 15

A 60-year-old male manual laborer presents with chronic shoulder weakness and pseudoparalysis of forward elevation. MRI demonstrates a massive, retracted, and irreparable posterosuperior rotator cuff tear (supraspinatus and infraspinatus) with advanced fatty infiltration (Goutallier stage 4), but the subscapularis is fully intact. There is no evidence of glenohumeral osteoarthritis. Which of the following is the most appropriate tendon transfer to restore active external rotation and elevation?

Explanation

In a younger or highly active patient with a massive, irreparable posterosuperior rotator cuff tear (involving the supraspinatus and infraspinatus) and no significant glenohumeral arthritis, a latissimus dorsi or lower trapezius tendon transfer is indicated. These transfers recreate the force couple provided by the posterior cuff, significantly improving active external rotation and forward elevation. Pectoralis major transfer is typically reserved for irreparable subscapularis tears.

Question 16

A surgeon is performing a medial patellofemoral ligament (MPFL) reconstruction on an 18-year-old female. Precise anatomic location of the femoral attachment is critical to avoid graft anisometry. Radiographically identified by Schöttle's point, where is the true anatomic femoral footprint of the MPFL located?

Explanation

The anatomic femoral origin of the MPFL is located in a 'saddle' or sulcus on the medial aspect of the distal femur, specifically between the adductor tubercle (proximal and posterior) and the medial epicondyle (distal and anterior). Radiographically, Schöttle's point is used on a perfect lateral fluoroscopic image to identify this footprint. Non-anatomic placement, particularly placing the graft too proximal or anterior, leads to excessive graft tension during knee flexion.

Question 17

A 13-year-old male athlete presents with vague anterior knee pain and catching. Radiographs and subsequent MRI confirm the presence of Osteochondritis Dissecans (OCD) with intact overlying articular cartilage. Statistically, what is the most common anatomic location for an OCD lesion in the knee?

Explanation

Osteochondritis dissecans (OCD) of the knee most frequently occurs on the lateral aspect of the medial femoral condyle. This location accounts for approximately 70-80% of all knee OCD lesions. A common mnemonic to remember this is 'LAME' (Lateral Aspect of the Medial Epicondyle/Condyle). Because the patient's physes are open and the cartilage is intact (stable lesion), initial treatment should be non-operative, focusing on activity modification and restricted weight-bearing.

Question 18

A 21-year-old collegiate baseball pitcher presents with medial elbow pain and diminished throwing velocity. He demonstrates a positive moving valgus stress test, and MRI confirms a full-thickness tear of the ulnar collateral ligament (UCL). Which distinct anatomical structure forms the primary restraint to valgus stress at the elbow?

Explanation

The anterior bundle of the ulnar collateral ligament (UCL) is the primary restraint to valgus stress of the elbow from 30 to 120 degrees of flexion. It originates from the anteroinferior surface of the medial epicondyle and inserts on the sublime tubercle of the anteromedial coronoid process of the ulna. It is composed of anterior and posterior bands, which function reciprocally to maintain tension throughout the elbow's arc of motion.

Question 19

A 20-year-old elite track athlete sustains an acute fracture at the metaphyseal-diaphyseal junction of the 5th metatarsal (Jones fracture) during a sprint. Given her status as a high-level competitive athlete, what is the gold standard treatment to minimize the risk of nonunion and expedite return to play?

Explanation

A Jones fracture occurs at the metaphyseal-diaphyseal junction of the fifth metatarsal. This specific location is notorious for being a vascular 'watershed' zone, leading to high rates of delayed union and nonunion with conservative treatment. In elite or highly competitive athletes, early intramedullary screw fixation is the treatment of choice, as it significantly decreases the time to clinical union and allows for a faster, more predictable return to play.

Question 20

A 9-year-old boy (Tanner Stage 1) sustains a complete anterior cruciate ligament (ACL) rupture while skiing. He has wide-open physes and significant remaining growth potential. The parents opt for surgical intervention due to severe recurrent instability. Which surgical technique is most strongly recommended to minimize the risk of iatrogenic leg length discrepancy or angular deformity?

Explanation

In prepubescent children (Tanner stage 1 or 2) with significant remaining growth potential, traditional transphyseal ACL reconstructions (especially those utilizing bone blocks or placing fixation hardware across the physis) pose a high risk of physeal arrest, leading to leg-length discrepancies or severe angular deformities. A physeal-sparing extra-articular/intra-articular technique, such as the iliotibial band over-the-top technique (Micheli-Kocher), completely avoids drilling across the femoral and tibial physes and is the recommended approach.

Question 21

A 25-year-old football player sustains a knee hyperextension injury. On physical examination, the dial test reveals a 15-degree increase in external rotation at 30 degrees of knee flexion compared to the contralateral side. However, at 90 degrees of knee flexion, external rotation is symmetric bilaterally. What is the most likely diagnosis?

Explanation

The dial test measures external rotation of the tibia. An increase of 10-15 degrees or more compared to the normal knee is positive. Increased external rotation at 30 degrees of flexion with symmetry at 90 degrees indicates an isolated posterolateral corner (PLC) injury. If external rotation is increased at both 30 and 90 degrees, it suggests a combined PCL and PLC injury.

Question 22

A 22-year-old rugby player presents with recurrent anterior shoulder dislocations. Preoperative CT imaging reveals 25% anterior glenoid bone loss and an engaging Hill-Sachs lesion. Which of the following is the most appropriate surgical treatment?

Explanation

Significant glenoid bone loss (>20-25%) in a collision athlete with recurrent instability is a classic indication for a bone-block augmentation procedure, such as the Latarjet procedure (coracoid transfer). Arthroscopic soft-tissue repair alone has an unacceptably high failure rate in the setting of critical bone loss and an engaging Hill-Sachs lesion.

Question 23

An 11-year-old boy (Tanner stage 1) sustains a midsubstance ACL tear. Radiographs confirm widely open physes. The family elects for surgical management to prevent further meniscal damage. Which of the following surgical options is most appropriate?

Explanation

In prepubescent children with significant remaining growth (Tanner stage 1 or 2, widely open physes), physeal-sparing techniques are recommended to avoid growth arrest. An iliotibial band extra-articular reconstruction (e.g., Kocher or Micheli technique) routes the graft around the physes without drilling tunnels across them. Transphyseal techniques risk premature physeal closure in this age group.

Question 24

A 26-year-old hockey player presents with chronic anterior groin pain exacerbated by hip flexion and internal rotation. Radiographs reveal an alpha angle of 70 degrees, a normal center-edge angle (CEA), and a negative cross-over sign. What is the primary pathomechanism of this patient's condition?

Explanation

An alpha angle greater than 50-55 degrees indicates an abnormal femoral head-neck junction, characteristic of Cam impingement. Pincer impingement involves acetabular overcoverage (e.g., increased CEA or positive cross-over sign indicative of retroversion). The patient's findings isolate Cam morphology as the primary issue.

Question 25

What is the primary underlying biomechanical cause of posteromedial impingement (valgus extension overload syndrome) in the elbow of a throwing athlete?

Explanation

Valgus extension overload in throwers is primarily driven by chronic repetitive microtrauma leading to attenuation of the anterior band of the medial ulnar collateral ligament (UCL). This valgus laxity allows excessive abnormal shear forces on the posteromedial olecranon during the deceleration and follow-through phases, causing osteophyte formation and impingement.

Question 26

A 19-year-old female presents with recurrent lateral patellar dislocations. Evaluation reveals a tibial tubercle-trochlear groove (TT-TG) distance of 22 mm and a Caton-Deschamps index of 1.0. The trochlea shows mild dysplasia. What is the most appropriate surgical management?

Explanation

An abnormal TT-TG distance >20 mm generally warrants a medializing tibial tubercle osteotomy (TTO) to correct the lateralized extensor mechanism vector. Because the patellar height is normal (Caton-Deschamps ~1.0), distalization is not needed. This should be combined with an MPFL reconstruction to restore the primary soft-tissue restraint to lateral translation.

Question 27

A 14-year-old gymnast complains of lateral elbow pain and catching. MRI of the elbow shows an osteochondritis dissecans (OCD) lesion of the capitellum with intact articular cartilage, but there is a rim of T2-hyperintense fluid behind the lesion. What is the best initial surgical management?

Explanation

Fluid behind the OCD lesion on MRI indicates an unstable fragment. Because the articular cartilage is still intact, the best treatment is salvage of the native cartilage via arthroscopic internal fixation. Nonoperative management is generally reserved for stable lesions in patients with open physes. Drilling alone is for stable lesions.

Question 28

A 45-year-old female felt a 'pop' in the back of her knee while squatting. MRI demonstrates a complete posterior root tear of the medial meniscus with 4 mm of meniscal extrusion, but no significant osteoarthritis. Mechanical alignment is neutral. What is the recommended treatment?

Explanation

Meniscal root tears eliminate hoop stresses, acting biomechanically similar to a total meniscectomy and leading to rapid joint degeneration. In an active patient without advanced arthritis or malalignment, anatomical repair via a transtibial pull-out technique (or suture anchor repair) is the gold standard to restore hoop tension and slow progression to osteoarthritis.

Question 29

Regarding the coracoclavicular (CC) ligaments in the setting of an acromioclavicular (AC) joint reconstruction, which of the following statements is true regarding their anatomic orientation and biomechanical function?

Explanation

The coracoclavicular (CC) ligaments consist of the conoid and trapezoid. The conoid is located medial and posterior and is the primary restraint to superior translation of the clavicle. The trapezoid is lateral and anterior, and serves as the primary restraint against axial compression and anterior-posterior translation.

Question 30

As the Achilles tendon descends toward its insertion on the calcaneus, how do the constituent fibers of the gastrocnemius and soleus typically rotate?

Explanation

The Achilles tendon fibers undergo a 90-degree internal rotation as they descend to the calcaneus. The superficial fibers originating from the gastrocnemius rotate to insert on the lateral aspect of the posterior calcaneal tuberosity, while the deep fibers from the soleus rotate to insert on the medial aspect.

Question 31

A 40-year-old water skier suffers a forced hyperflexion injury of the hip with an extended knee, resulting in a proximal hamstring avulsion. Which of the following muscles form the conjoined tendon of the proximal hamstring complex at the ischial tuberosity?

Explanation

The proximal hamstring complex attaches to the ischial tuberosity. It consists of the semitendinosus and the long head of the biceps femoris, which arise together as a conjoined tendon from the posteromedial facet of the tuberosity. The semimembranosus originates separately from the anterolateral facet.

Question 32

During the surgical repair of a complete pectoralis major rupture in a weightlifter, the surgeon must anatomically restore the footprint. What is the anatomic relationship of the sternal head footprint relative to the clavicular head footprint on the humerus?

Explanation

The pectoralis major tendon twists 180 degrees before its insertion on the lateral lip of the bicipital groove. Because of this twist, the lower/inferior (sternal) fibers cross behind the upper (clavicular) fibers to insert proximal and posterior (deep) to the clavicular head footprint.

Question 33

A 28-year-old volleyball player complains of vague posterior shoulder pain and numbness over the lateral deltoid. MRI confirms Quadrilateral Space Syndrome causing compression of the axillary nerve and posterior humeral circumflex artery. Which of the following structures forms the inferior border of this anatomic space?

Explanation

The boundaries of the quadrilateral space are the teres minor (superior), teres major (inferior), long head of the triceps (medial), and the surgical neck of the humerus (lateral). Compression here leads to axillary nerve and posterior humeral circumflex artery compromise.

Question 34

A 'ramp lesion' of the knee is frequently encountered during anterior cruciate ligament (ACL) reconstruction. This pathology specifically refers to a tear located in which of the following anatomic zones?

Explanation

A meniscal ramp lesion is defined as a disruption of the meniscocapsular junction or the peripheral attachment of the posterior horn of the medial meniscus. It is highly associated with ACL tears and can be missed on standard anterior portal viewing, often requiring a posteromedial portal for adequate visualization and repair.

Question 35

A 22-year-old collegiate baseball pitcher presents with posterior shoulder pain during the late cocking phase of throwing. Physical examination reveals a 20-degree glenohumeral internal rotation deficit (GIRD). Which of the following MRI findings is most characteristic of 'internal impingement' in this patient?

Explanation

Internal impingement (posterosuperior impingement) occurs during the late cocking phase (abduction and maximal external rotation), causing the greater tuberosity to abut the posterosuperior glenoid. This pinches the posterior labrum and the articular side of the supraspinatus/infraspinatus tendons, leading to labral fraying and partial articular-sided rotator cuff tears (PASTA lesions).

Question 36

An athlete sustains a syndesmotic ('high') ankle sprain. According to classic biomechanical studies, which ligament is typically the first to fail during the external rotation mechanism of injury?

Explanation

During an external rotation injury, the fibula is externally rotated away from the tibia. The anterior inferior tibiofibular ligament (AITFL) is the most anterior structure of the syndesmosis and is placed under the greatest tension, making it the first ligament to tear in the typical sequential failure of the syndesmosis.

Question 37

A 45-year-old construction worker presents with a symptomatic Type II SLAP tear. According to recent literature, compared to arthroscopic SLAP repair, primary biceps tenodesis in patients in this age demographic is associated with:

Explanation

In patients over 40 years old, primary biceps tenodesis for symptomatic SLAP tears yields significantly higher satisfaction, lower rates of postoperative stiffness, and lower revision rates compared to arthroscopic SLAP repair. SLAP repair in this age group has notoriously unpredictable outcomes and higher failure rates.

Question 38

During a single-bundle posterior cruciate ligament (PCL) reconstruction, the femoral tunnel is positioned to anatomically reconstruct the dominant bundle. Which specific bundle is reconstructed, and at what degree of knee flexion should the graft typically be tensioned?

Explanation

The PCL consists of the larger, stronger anterolateral (AL) bundle and the smaller posteromedial (PM) bundle. Single-bundle reconstructions aim to replace the dominant AL bundle. The AL bundle is tightest in flexion; therefore, the graft is typically tensioned and fixed at 90 degrees of knee flexion.

Question 39

In the evaluation of anterior shoulder instability, the 'glenoid track' concept is used to determine the risk of engagement. A Hill-Sachs lesion is considered 'off-track' (and thus at high risk of engagement) if:

Explanation

The glenoid track is approximately 83% of the intact glenoid width minus the width of any anterior bone loss. The Hill-Sachs interval (HSI) is the width of the Hill-Sachs lesion plus the intact bone bridge medial to the rotator cuff footprint. If the HSI is greater than the glenoid track, the lesion extends outside the track during arm abduction/external rotation, making it 'off-track' and likely to engage.

Question 40

The anterior bundle of the medial ulnar collateral ligament (UCL) of the elbow is the primary restraint to valgus stress. Which specific sub-portion of the anterior bundle is most taut in full elbow extension?

Explanation

The anterior bundle of the UCL is divided into anterior and posterior bands. The anterior band is isometric but becomes tightest in extension and up to about 90 degrees of flexion. The posterior band becomes taut in greater degrees of flexion (typically >60 to 120 degrees). Thus, in full extension, the anterior band is the primary restraint to valgus stress.

Question 41

A 45-year-old active male sustains a medial meniscus posterior root tear. Biomechanically, what is the consequence of leaving this tear unrepaired compared to a completely meniscectomized knee?

Explanation

A posterior root tear of the medial meniscus completely disrupts the hoop stresses, rendering the meniscus non-functional. This results in peak tibiofemoral contact pressures that are biomechanically equivalent to a total medial meniscectomy.

Question 42

During an ACL reconstruction, the surgeon utilizes a bone-patellar tendon-bone (BPTB) autograft. Compared to hamstring autografts, BPTB grafts are historically associated with a higher incidence of which postoperative complication?

Explanation

BPTB autografts are associated with a significantly higher incidence of donor-site morbidity, specifically anterior knee pain and kneeling pain, compared to hamstring autografts. Rates of graft rupture and postoperative infection are largely comparable, though BPTB shows less tunnel widening.

Question 43

A 19-year-old female gymnast presents with atraumatic multidirectional shoulder instability. Following 6 months of physical therapy, she continues to subluxate inferiorly. If surgical intervention is performed, which capsular structure must be primarily addressed to correct the inferior instability?

Explanation

In multidirectional instability (MDI), the primary structural redundancy is typically a patulous inferior capsule. An inferior capsular shift addresses this redundant inferior pouch, decreasing inferior translation and global laxity.

Question 44

A 62-year-old male with a massive, irreparable posterosuperior rotator cuff tear and no glenohumeral arthritis undergoes superior capsular reconstruction (SCR). What is the primary biomechanical goal of this procedure?

Explanation

The primary biomechanical goal of SCR is to act as a static restraint against superior humeral head migration. Depressing the humeral head restores the coronal plane force couple, thereby improving the mechanical advantage and efficiency of the intact deltoid.

Question 45

An MPFL reconstruction is planned for a 17-year-old female with recurrent lateral patellar dislocations. To prevent postoperative patellofemoral over-constraint, where must the femoral tunnel be positioned relative to radiographic landmarks (Schöttle's point)?

Explanation

Schöttle's point is located 1 mm anterior to the posterior femoral cortex line, 2.5 mm distal to the posterior origin of the medial femoral condyle, and proximal to the posterior aspect of Blumensaat's line. Anatomic placement ensures the graft does not over-tension during knee flexion.

Question 46

During an anatomic posterolateral corner (PLC) reconstruction, accurate placement of the fibular collateral ligament (FCL) graft is critical. Where is the native FCL femoral attachment located relative to the popliteus sulcus?

Explanation

The native FCL femoral footprint is located 18.5 mm proximal and slightly posterior to the popliteus tendon attachment on the lateral femoral epicondyle. Non-anatomic placement can lead to graft capturing and restriction of normal knee range of motion.

Question 47

A 26-year-old baseball pitcher presents with posterior shoulder pain and a "dead arm" sensation during the late cocking phase of throwing. He exhibits a 25-degree glenohumeral internal rotation deficit (GIRD). What is the primary pathomechanical cause of his suspected labral pathology?

Explanation

In throwing athletes, maximum external rotation in the late cocking phase causes a posterior shift of the biceps vector, creating a torsional "peel-back" force on the superior labrum. This is exacerbated by posterior capsular tightness (GIRD), driving Type II SLAP lesions.

Question 48

During hip arthroscopy for mixed femoroacetabular impingement (FAI), excessive bony resection of a cam lesion extending too far posterosuperiorly on the femoral head-neck junction risks injury to the terminal branches of which artery?

Explanation

The medial circumflex femoral artery (MCFA) provides the primary blood supply to the femoral head via the retinacular vessels, which enter the posterosuperior capsule. Overzealous resection in this area endangers these vessels and can lead to avascular necrosis (AVN).

Question 49

A 30-year-old runner with a focal 3 cm² full-thickness chondral defect on the medial femoral condyle undergoes Matrix-induced autologous chondrocyte implantation (MACI). What is the primary histological goal of the repair tissue generated by MACI compared to microfracture?

Explanation

Microfracture primarily stimulates a marrow healing response resulting in fibrocartilage, which is rich in Type I collagen. Cell-based therapies like MACI aim to regenerate hyaline-like cartilage, which possesses superior biomechanical properties and is composed predominantly of Type II collagen.

Question 50

A 42-year-old male opts for non-operative management with early functional rehabilitation for an acute Achilles tendon rupture. Which of the following is the most significant advantage of this approach compared to traditional open surgical repair?

Explanation

Non-operative management with early functional rehab avoids surgical complications, most notably iatrogenic sural nerve injury and wound infections. Modern functional bracing protocols have achieved re-rupture rates comparable to operative intervention.

Question 51

A 25-year-old sustains a Type III acromioclavicular (AC) joint separation. Biomechanically, which ligamentous complex serves as the primary restraint to superior translation of the distal clavicle?

Explanation

The coracoclavicular (CC) ligaments (conoid and trapezoid) are the primary static restraints to superior and inferior translation of the clavicle. The acromioclavicular ligaments primarily control horizontal (anteroposterior) stability.

Question 52

A lateral extra-articular tenodesis (LET) is performed to augment an ACL reconstruction in an athlete with a high-grade pivot shift. Biomechanically, LET or anterolateral ligament (ALL) reconstruction primarily limits which coupled motion?

Explanation

The anterolateral structures of the knee, including the ALL and iliotibial band, are primary restraints to internal tibial rotation at higher degrees of knee flexion. Augmenting these structures addresses residual anterolateral rotatory instability (pivot shift).

Question 53

A 35-year-old weightlifter undergoes an acute distal biceps tendon repair using a single-incision anterior approach. Which nerve is at the highest risk of iatrogenic injury due to lateral retraction during this exposure?

Explanation

The lateral antebrachial cutaneous nerve (LABCN) is the most commonly injured nerve in a single-incision anterior approach to the distal biceps. The PIN is at higher risk during a two-incision approach or if dissection strays lateral to the bicipital tuberosity.

Question 54

During an ulnar collateral ligament (UCL) reconstruction utilizing a docking technique, what is the primary biomechanical rationale for precise graft placement on the medial ulna?

Explanation

The anterior bundle of the UCL is the primary restraint to valgus stress and attaches to the sublime tubercle of the ulna. Modern reconstruction techniques emphasize anatomic recreation of this broad footprint to optimize graft tension throughout the elbow's arc of motion.

Question 55

A 24-year-old volleyball player is scheduled for surgical debridement of recalcitrant proximal patellar tendinopathy (Jumper's knee). Where is the classic pathological lesion located in this condition?

Explanation

Proximal patellar tendinopathy classically involves mucoid degeneration and microtearing at the deep (posterior) and proximal aspect of the tendon, directly at its origin on the inferior pole of the patella.

Question 56

A 45-year-old female presents with acute posterior knee pain after deep flexion. MRI shows a medial meniscus posterior root tear with 3 mm of extrusion. What is the primary biomechanical consequence of leaving this unrepaired?

Explanation

A medial meniscus root tear behaves biomechanically like a total meniscectomy by disrupting hoop stresses. This leads to significantly increased peak contact pressures and accelerated osteoarthritis.

Question 57

A 20-year-old rugby player has recurrent anterior shoulder instability. CT shows 15% glenoid bone loss and a Hill-Sachs lesion. Based on the 'glenoid track' concept, an 'off-track' Hill-Sachs lesion is defined by which of the following?

Explanation

An 'off-track' Hill-Sachs lesion occurs when its medial margin lies medial to the glenoid track, meaning it will engage the anterior glenoid rim during abduction and external rotation. This usually requires a Remplissage or bone block procedure.

Question 58

During medial patellofemoral ligament (MPFL) reconstruction, accurate femoral tunnel placement is crucial. Using fluoroscopy, where is the anatomic femoral origin of the MPFL located relative to Schöttle's point?

Explanation

The anatomic femoral origin of the MPFL lies in the saddle between the medial epicondyle and the adductor tubercle. Radiographically, Schöttle's point is 1 mm anterior to the posterior cortical line and 2.5 mm distal to the posterior border of Blumensaat's line.

Question 59

A 28-year-old male sustains a KD-III-M knee dislocation. He presents with a foot drop and inability to evert the foot. Electromyography (EMG) at 6 weeks shows no motor unit potentials in the tibialis anterior. What is the most appropriate management regarding the nerve injury?

Explanation

Common peroneal nerve palsy complicates up to 25% of knee dislocations. Observation and supportive care with an AFO are indicated initially, as spontaneous recovery can occur within 3 to 6 months before considering nerve exploration or tendon transfers.

Question 60

A 30-year-old male hockey player undergoes hip arthroscopy for symptomatic femoroacetabular impingement (FAI). An isolated cam lesion is resected. Which anatomic landmark marks the most common location of a cam deformity on the femoral head-neck junction?

Explanation

Cam lesions are most commonly located at the anterosuperior aspect of the femoral head-neck junction. Resection restores the normal concavity, preventing impingement during hip flexion and internal rotation.

Question 61

A 19-year-old gymnast requires ACL reconstruction. The surgeon considers a bone-patellar tendon-bone (BPTB) autograft. Which of the following is the most widely recognized long-term complication associated with this specific graft choice compared to hamstring autograft?

Explanation

BPTB autograft is known for excellent biomechanical strength but has a significantly higher incidence of donor-site morbidity, specifically anterior knee pain and pain with kneeling, compared to hamstring autografts.

Question 62

A 65-year-old male presents with pseudoparalysis of the shoulder and an irreparable massive posterosuperior rotator cuff tear. Radiographs show Hamada Grade 4 changes. Which is the most appropriate surgical treatment?

Explanation

Reverse total shoulder arthroplasty is the treatment of choice for a patient with cuff tear arthropathy (Hamada 4) and pseudoparalysis. It utilizes the deltoid to elevate the arm by medializing and distalizing the center of rotation.

Question 63

A 29-year-old bodybuilder feels a pop in his anterior axilla while bench pressing. Examination reveals a loss of the anterior axillary fold. MRI confirms a rupture of the pectoralis major at the sternocostal head insertion. Where does the sternocostal head insert relative to the clavicular head on the humerus?

Explanation

The pectoralis major tendon twists 180 degrees before inserting on the lateral lip of the bicipital groove. The sternocostal head inserts deep (posterior) and distal to the clavicular head, making it the most vulnerable during eccentric loading.

Question 64

A 14-year-old male presents with knee pain. MRI reveals a 2x2 cm osteochondritis dissecans (OCD) lesion on the lateral aspect of the medial femoral condyle. Which MRI finding is most indicative of lesion instability requiring surgical fixation rather than non-operative management?

Explanation

A high T2 signal rim surrounding the osteochondral fragment indicates synovial fluid tracking behind the lesion. This is the most reliable MRI sign of instability, necessitating surgical stabilization rather than conservative care.

Question 65

A 24-year-old professional baseball pitcher presents with vague anterior shoulder pain and a 'dead arm' sensation. Examination reveals Glenohumeral Internal Rotation Deficit (GIRD) of 25 degrees. During the late cocking phase of throwing, which mechanism is primarily responsible for a Type II SLAP tear?

Explanation

In the late cocking phase (abduction and maximal external rotation), the biceps vector shifts posteriorly. This creates a torsional 'peel-back' force on the superior labrum, leading to Type II SLAP tears in overhead athletes.

Question 66

A 22-year-old football player sustains a syndesmotic ankle sprain. Intraoperative evaluation using the Cotton test indicates instability. The surgeon opts for suture button fixation over syndesmotic screws. What is the primary biomechanical advantage of dynamic suture button fixation?

Explanation

Suture button fixation allows for dynamic stabilization, preserving the normal physiologic widening and micro-motion of the distal tibiofibular syndesmosis during ankle dorsiflexion. It also reduces the need for routine hardware removal.

Question 67

A 21-year-old collegiate pitcher undergoes ulnar collateral ligament (UCL) reconstruction using a palmaris longus autograft. Which bundle of the native UCL is the primary restraint to valgus stress between 30 and 120 degrees of elbow flexion, and thus the target for reconstruction?

Explanation

The anterior bundle of the UCL is the primary stabilizer against valgus stress. Specifically, its anterior band is tight in extension and the primary restraint up to 120 degrees of flexion, making it the critical structure to reconstruct.

Question 68

A 26-year-old active female has a symptomatic full-thickness chondral defect on her medial femoral condyle measuring 4.5 cm^2. She has failed conservative therapy. Which of the following surgical interventions is most appropriate for a defect of this size?

Explanation

MACI or osteochondral allograft transplantation are indicated for large chondral defects (>2-3 cm^2). Microfracture and OATS (autograft) are typically reserved for smaller lesions due to donor site morbidity and inferior repair tissue.

Question 69

A 45-year-old female presents with acute posterior knee pain after a deep squat. MRI reveals a complete radial tear at the posterior horn of the medial meniscus, 2 mm from its root attachment. What is the expected biomechanical consequence if this lesion is left untreated?

Explanation

A medial meniscus root tear or a complete radial tear near the root disrupts the circumferential fibers. This leads to a complete loss of hoop stresses, which is biomechanically equivalent to a total meniscectomy and rapidly accelerates osteoarthritis.

Question 70

During reconstruction of the medial patellofemoral ligament (MPFL), identifying the correct femoral footprint is critical for graft isometry. According to Schottle's radiographic landmarks, where is the optimal femoral attachment located on a strictly lateral radiograph?

Explanation

The Schottle point is the radiographic center of the MPFL femoral footprint. It is defined as 1 mm anterior to the posterior cortical line, 2.5 mm distal to the posterior border of the medial femoral condyle articular surface, and proximal to the level of Blumensaat's line.

Question 71

In evaluating a patient with suspected glenohumeral instability, which ligamentous structure serves as the primary restraint to inferior translation of the humerus when the shoulder is abducted to 90 degrees?

Explanation

The inferior glenohumeral ligament (IGHL) complex is the primary static stabilizer against anterior, posterior, and inferior translation when the shoulder is abducted to 90 degrees. The superior glenohumeral and coracohumeral ligaments resist inferior translation when the arm is adducted.

Question 72

A 22-year-old collegiate baseball pitcher complains of medial elbow pain during the late cocking phase of throwing. What is the primary restraint to valgus stress at the elbow during this specific phase of the throwing motion?

Explanation

The anterior bundle of the ulnar collateral ligament (UCL) is the primary restraint to valgus stress at the elbow between 30 and 120 degrees of flexion. This corresponds to the late cocking and early acceleration phases of throwing where valgus forces are highest.

Question 73

A 28-year-old male undergoes hip arthroscopy for symptomatic femoroacetabular impingement (FAI). He has a large cam lesion requiring osteochondroplasty. To minimize the risk of a postoperative iatrogenic femoral neck fracture, the maximum recommended depth of the resection should not exceed what percentage of the femoral neck diameter?

Explanation

Biomechanical studies have shown that resecting more than 30% of the femoral neck diameter significantly reduces load-to-failure strength. Resections should be kept below this threshold to prevent iatrogenic femoral neck fractures.

Question 74

A 65-year-old patient presents with an irreparable massive rotator cuff tear, pseudoparalysis of the shoulder (active elevation less than 90 degrees), and an intact deltoid. Radiographs show Hamada grade 3 changes. What is the most appropriate definitive surgical management?

Explanation

Reverse total shoulder arthroplasty relies on the intact deltoid to elevate the arm and is the treatment of choice for rotator cuff arthropathy with pseudoparalysis. Superior capsular reconstruction is contraindicated in the presence of arthritis and pseudoparalysis.

Question 75

A 25-year-old football player sustains a contact injury to his knee. Clinical examination reveals increased external rotation of the tibia at 30 degrees of knee flexion compared to the contralateral side, but equal external rotation at 90 degrees. Which structure is most likely injured?

Explanation

A positive dial test (increased external rotation of 10 degrees or more) isolated to 30 degrees of flexion indicates an isolated posterolateral corner (PLC) injury. If it is positive at both 30 and 90 degrees, it indicates a combined PCL and PLC injury.

Question 76

A 12-year-old gymnast is diagnosed with an osteochondritis dissecans (OCD) lesion on the lateral aspect of the medial femoral condyle. Her physes are wide open. MRI shows a 1.5 cm lesion with no high T2 signal behind the fragment. What is the most appropriate initial management?

Explanation

Juvenile OCD lesions (open physes) that are stable (no high T2 signal line behind the fragment on MRI) have a high rate of spontaneous healing. A trial of non-operative management, including activity modification and restricted weight-bearing, is the first-line treatment.

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