Menu

Question 2021

Topic: Elbow & Forearm

A 35-year-old male falls on an outstretched hand and sustains a 'terrible triad' injury to the elbow. Operative management is planned. Following a standard deep-to-superficial surgical approach, what is the accepted sequence of structural repair to restore elbow stability?

. Lateral ulnar collateral ligament (LUCL), radial head, coronoid
. Radial head, coronoid, LUCL
. Coronoid, radial head, LUCL
. LUCL, coronoid, radial head
. Coronoid, LUCL, radial head

Correct Answer & Explanation

. Coronoid, radial head, LUCL


Explanation

The standard sequence of repair for a terrible triad injury addresses structures from deep to superficial: first the coronoid, followed by the radial head, and finally the lateral ulnar collateral ligament (LUCL).

Question 2022

Topic: 9. Shoulder and Elbow

A 65-year-old woman with advanced rheumatoid arthritis presents with a massive, irreparable rotator cuff tear, severe glenohumeral osteoarthritis, and pseudoparalysis of the shoulder. Physical exam confirms an intact and functioning deltoid muscle.

Which of the following is the most appropriate definitive management?

. Arthroscopic superior capsular reconstruction
. Anatomic total shoulder arthroplasty
. Reverse total shoulder arthroplasty (RTSA)
. Shoulder arthrodesis
. Hemiarthroplasty

Correct Answer & Explanation

. Reverse total shoulder arthroplasty (RTSA)


Explanation

Reverse total shoulder arthroplasty is the procedure of choice for cuff tear arthropathy with pseudoparalysis, provided the deltoid and axillary nerve are intact. Anatomic total shoulder arthroplasty is contraindicated due to the deficient rotator cuff.

Question 2023

Topic: 9. Shoulder and Elbow

A 19-year-old collegiate baseball pitcher presents with medial elbow pain during the late cocking phase of throwing. MRI arthrogram confirms a high-grade ulnar collateral ligament (UCL) tear. During UCL reconstruction (e.g., using the docking technique), the graft is primarily designed to replicate which specific structure?

. Posterior bundle of the UCL
. Anterior bundle of the UCL
. Transverse ligament of Cooper
. Radial collateral ligament
. Lateral ulnar collateral ligament

Correct Answer & Explanation

. Anterior bundle of the UCL


Explanation

The anterior bundle of the UCL is the primary restraint to valgus stress at the elbow, particularly from 30 to 120 degrees of flexion. UCL reconstruction techniques are designed to recreate the biomechanical function of this specific bundle.

Question 2024

Topic: Elbow & Forearm

A 24-year-old male sustains a posterior elbow dislocation. After closed reduction, the elbow is stable in 90 degrees of flexion but immediately subluxates when extended with the forearm in supination. This specific pattern of instability indicates insufficiency of which of the following structures?

. Anterior bundle of the UCL
. Lateral ulnar collateral ligament (LUCL)
. Annular ligament
. Quadrate ligament
. Biceps brachii tendon

Correct Answer & Explanation

. Lateral ulnar collateral ligament (LUCL)


Explanation

Posterolateral rotatory instability (PLRI) occurs due to insufficiency of the lateral ulnar collateral ligament (LUCL). It typically manifests as subluxation or dislocation when the elbow is extended, supinated, and subjected to an axial load or valgus force.

Question 2025

Topic: 9. Shoulder and Elbow

A 72-year-old woman presents with chronic right shoulder pain and an inability to raise her arm above the horizontal plane. Physical examination reveals active forward elevation to 40 degrees and passive elevation to 150 degrees. Radiographs demonstrate superior migration of the humeral head with articulation against the acromion

. Which of the following is the most appropriate surgical treatment?

. Arthroscopic rotator cuff repair
. Latissimus dorsi tendon transfer
. Hemiarthroplasty
. Anatomic total shoulder arthroplasty
. Reverse total shoulder arthroplasty

Correct Answer & Explanation

. Reverse total shoulder arthroplasty


Explanation

This patient has rotator cuff arthropathy with pseudoparalysis (active elevation less than 90 degrees with preserved passive motion). Reverse total shoulder arthroplasty is the treatment of choice as it shifts the center of rotation medially and inferiorly, allowing the deltoid to effectively elevate the arm.

Question 2026

Topic: Elbow & Forearm

A 42-year-old woman falls on an outstretched hand and sustains a "terrible triad" injury of the elbow. Which of the following structures is the primary restraint to posterolateral rotatory instability (PLRI) and must be meticulously repaired or reconstructed during surgery?

. Medial ulnar collateral ligament
. Lateral ulnar collateral ligament (LUCL)
. Radial collateral ligament
. Annular ligament
. Anterior capsule

Correct Answer & Explanation

. Lateral ulnar collateral ligament (LUCL)


Explanation

The lateral ulnar collateral ligament (LUCL) is the primary restraint to posterolateral rotatory instability. In a terrible triad injury, the LUCL is typically avulsed from the lateral epicondyle and must be repaired to restore elbow stability.

Question 2027

Topic: 9. Shoulder and Elbow

A 45-year-old man complains of elbow pain and a "clunking" sensation when pushing himself out of a chair. On examination, a positive pivot-shift test of the elbow is elicited. Which mechanism of injury is most commonly associated with this specific condition?

. Valgus stress with sudden forearm pronation
. Axial compression, valgus stress, and supination
. Direct trauma to the olecranon
. Repetitive microtrauma from overhead throwing
. Forced hyperflexion of the elbow

Correct Answer & Explanation

. Axial compression, valgus stress, and supination


Explanation

The patient has posterolateral rotatory instability (PLRI) due to lateral ulnar collateral ligament (LUCL) insufficiency. The classic mechanism of injury is a fall on the outstretched hand resulting in axial load, valgus stress, and forearm supination.

Question 2028

Topic: Elbow & Forearm

A 44-year-old weightlifter sustained an acute complete distal biceps tendon rupture and underwent surgical repair using a two-incision technique. Postoperatively, he has profound restriction of forearm pronation and supination but full elbow flexion and extension. What is the most likely complication responsible for his restricted motion?

. Posterior interosseous nerve (PIN) palsy
. Heterotopic ossification (radioulnar synostosis)
. Rerupture of the distal biceps tendon
. Anterior interosseous nerve (AIN) palsy
. Myositis ossificans of the brachialis

Correct Answer & Explanation

. Heterotopic ossification (radioulnar synostosis)


Explanation

The two-incision technique for distal biceps tendon repair has historically carried a higher risk of radioulnar synostosis (heterotopic ossification bridging the radius and ulna) compared to the single-incision technique. This complication directly causes profound loss of forearm rotation.

Question 2029

Topic: 9. Shoulder and Elbow

A 55-year-old woman presents with a 6-month history of progressive, severe, global loss of both active and passive shoulder range of motion. She denies any preceding trauma. Which of the following systemic conditions is most strongly associated with the development and refractoriness of her most likely diagnosis?

. Rheumatoid arthritis
. Hypothyroidism
. Diabetes mellitus
. Chronic kidney disease
. Systemic lupus erythematosus

Correct Answer & Explanation

. Diabetes mellitus


Explanation

This patient has idiopathic adhesive capsulitis (frozen shoulder). Diabetes mellitus is the strongest known systemic risk factor, associated with a higher incidence, bilateral involvement, and increased resistance to conservative treatments.

Question 2030

Topic: 9. Shoulder and Elbow

A 72-year-old female presents with severe right shoulder pain and an inability to actively elevate her arm above 40 degrees. Radiographs demonstrate superior migration of the humeral head with an acromiohumeral distance of 3 mm. Examination reveals intact deltoid function but positive lag signs. What is the most appropriate surgical treatment?

. Hemiarthroplasty
. Anatomic total shoulder arthroplasty
. Reverse total shoulder arthroplasty
. Arthroscopic rotator cuff repair
. Arthroscopic debridement and subacromial decompression

Correct Answer & Explanation

. Reverse total shoulder arthroplasty


Explanation

Reverse total shoulder arthroplasty is the treatment of choice for rotator cuff tear arthropathy in an elderly patient with intact deltoid function. The prosthesis medializes and distalizes the center of rotation, allowing the deltoid to effectively elevate the arm despite a deficient rotator cuff.

Question 2031

Topic: Elbow & Forearm

A 42-year-old male presents with a "terrible triad" injury of the elbow following a fall onto an outstretched hand. When performing the surgical reconstruction, what is the most widely accepted sequence of repair?

. Lateral collateral ligament (LCL) repair followed by radial head fixation and coronoid fixation
. Coronoid fixation followed by radial head fixation or replacement, and finally lateral collateral ligament (LCL) repair
. Radial head fixation followed by lateral collateral ligament (LCL) repair, and finally coronoid fixation
. Coronoid fixation followed by medial collateral ligament (MCL) repair, and finally radial head fixation
. Medial collateral ligament (MCL) repair followed by coronoid fixation, and finally radial head fixation

Correct Answer & Explanation

. Coronoid fixation followed by radial head fixation or replacement, and finally lateral collateral ligament (LCL) repair


Explanation

The terrible triad of the elbow involves an elbow dislocation with concomitant radial head and coronoid process fractures. The standard surgical sequence proceeds from deep to superficial: fixing the coronoid first, followed by the radial head, and finally repairing the lateral collateral ligament (LCL).

Question 2032

Topic: Elbow & Forearm

A 35-year-old bodybuilder feels a sudden pop in his anterior elbow during a heavy bicep curl. The hook test is positive. The surgeon utilizes a single-incision anterior approach to repair the distal biceps tendon. Which of the following nerves is at highest risk of iatrogenic injury with this specific approach?

. Median nerve
. Radial nerve
. Ulnar nerve
. Lateral antebrachial cutaneous nerve
. Posterior interosseous nerve

Correct Answer & Explanation

. Lateral antebrachial cutaneous nerve


Explanation

The lateral antebrachial cutaneous nerve (LABCN) courses superficially in the lateral aspect of the antecubital fossa near the cephalic vein. It is the most commonly injured nerve during a single-incision anterior approach for distal biceps tendon repair, resulting in lateral forearm paresthesias.

Question 2033

Topic: 9. Shoulder and Elbow

A 45-year-old female sustains a coronal shear fracture of the capitellum that extends medially to include the majority of the trochlea (McKee modification Type IV). Open reduction and internal fixation with headless compression screws is planned. What is the most common complication following surgical management of this injury?

. Ulnar nerve palsy
. Elbow stiffness
. Radioulnar synostosis
. Nonunion
. Avascular necrosis of the radial head

Correct Answer & Explanation

. Elbow stiffness


Explanation

Coronal shear fractures of the distal humerus involve significant intra-articular disruption and require extensive surgical exposure for accurate reduction. Consequently, post-traumatic elbow stiffness (loss of terminal extension) is the most frequently encountered postoperative complication.

Question 2034

Topic: Elbow & Forearm

A 42-year-old man falls from a height and sustains a complex elbow dislocation.

Imaging reveals a posterolateral elbow dislocation, a comminuted radial head fracture, and a type II coronoid fracture. During operative management, what is the most appropriate sequence of reconstruction?

. LCL repair, coronoid fixation, radial head arthroplasty
. Coronoid fixation, radial head arthroplasty, LCL repair
. Radial head arthroplasty, coronoid fixation, MCL repair
. Coronoid fixation, LCL repair, radial head arthroplasty
. MCL repair, LCL repair, radial head arthroplasty

Correct Answer & Explanation

. Coronoid fixation, radial head arthroplasty, LCL repair


Explanation

The standard surgical sequence for a terrible triad injury is from deep to superficial: coronoid fixation, followed by radial head replacement or fixation, and finally lateral collateral ligament (LCL) repair. This restores the anterior and lateral bony and ligamentous buttresses to prevent recurrent posterior subluxation.

Question 2035

Topic: Elbow & Forearm

A 45-year-old man undergoes a single-incision anterior approach for repair of an acute distal biceps tendon rupture. Postoperatively, he notes numbness along the lateral aspect of his forearm. Which nerve was most likely injured during the exposure?

. Posterior interosseous nerve
. Lateral antebrachial cutaneous nerve
. Superficial radial nerve
. Median nerve
. Anterior interosseous nerve

Correct Answer & Explanation

. Lateral antebrachial cutaneous nerve


Explanation

The lateral antebrachial cutaneous nerve (LABC) is the most commonly injured structure during a single-incision anterior approach for distal biceps repair. The posterior interosseous nerve (PIN) is more at risk during a two-incision approach or when deep retractors are placed laterally.

Question 2036

Topic: Shoulder Arthroplasty & Arthritis

A 78-year-old woman with severe osteoporosis sustains a comminuted 4-part proximal humerus fracture. The humeral head is split, and the tuberosities are widely displaced. She is treated with a reverse total shoulder arthroplasty (RTSA). Healing of which structure is most critical to restore active external rotation?

. Subscapularis
. Lesser tuberosity
. Greater tuberosity
. Coracoacromial ligament
. Pectoralis major

Correct Answer & Explanation

. Greater tuberosity


Explanation

In RTSA for proximal humerus fractures, anatomic healing of the greater tuberosity is crucial for restoring active external rotation, as it serves as the attachment point for the infraspinatus and teres minor. Failure of greater tuberosity healing often results in a significant external rotation lag.

Question 2037

Topic: Elbow & Forearm

A 40-year-old weightlifter felt a sudden pop in his antecubital fossa and presents with weakness in supination. The Hook test is positive. If he undergoes a single-incision anterior approach for distal biceps tendon repair, which nerve is most at risk of injury?

. Posterior interosseous nerve
. Median nerve
. Lateral antebrachial cutaneous nerve
. Ulnar nerve
. Anterior interosseous nerve

Correct Answer & Explanation

. Lateral antebrachial cutaneous nerve


Explanation

The lateral antebrachial cutaneous nerve is the most frequently injured nerve during a single-incision anterior approach for distal biceps repair. The posterior interosseous nerve is more commonly at risk during a two-incision approach.

Question 2038

Topic: Elbow & Forearm

A 35-year-old woman falls on an outstretched hand, sustaining an elbow dislocation with associated fractures of the radial head and the coronoid process. During surgical reconstruction, what is the most widely accepted sequence of repair?

. Radial head, coronoid, lateral collateral ligament (LCL)
. Coronoid, radial head, lateral collateral ligament (LCL)
. Lateral collateral ligament (LCL), coronoid, radial head
. Coronoid, lateral collateral ligament (LCL), radial head
. Radial head, lateral collateral ligament (LCL), coronoid

Correct Answer & Explanation

. Coronoid, radial head, lateral collateral ligament (LCL)


Explanation

The standard surgical sequence for treating a terrible triad injury of the elbow is fixation of the coronoid first (to restore the anterior buttress), followed by radial head replacement or fixation, and finally repair of the lateral ulnar collateral ligament (LUCL).

Question 2039

Topic: Shoulder Arthroplasty & Arthritis

A 75-year-old osteoporotic woman sustains a displaced 4-part proximal humerus fracture. The articular surface is subluxated, and the tuberosities are widely displaced. Which treatment modality is associated with the most reliable return of forward elevation?

. Nonoperative management with a sling
. ORIF with a locking plate
. Hemiarthroplasty
. Reverse total shoulder arthroplasty
. Intramedullary nailing

Correct Answer & Explanation

. Reverse total shoulder arthroplasty


Explanation

In elderly patients with severe osteoporosis and displaced 4-part proximal humerus fractures, reverse total shoulder arthroplasty (RTSA) provides more reliable pain relief and functional restoration than hemiarthroplasty or ORIF. It relies on deltoid function rather than predictable tuberosity healing.

Question 2040

Topic: 9. Shoulder and Elbow

A 40-year-old man falls onto an outstretched hand and sustains a 'terrible triad' injury of the elbow. He is taken to the operating room for surgical stabilization. After repairing the coronoid and stabilizing the radial head, the elbow remains unstable. According to the standard stepwise surgical protocol, which structure is typically addressed next?

. Anterior capsule
. Medial collateral ligament (MCL)
. Lateral collateral ligament (LCL)
. Brachialis tendon
. Annular ligament

Correct Answer & Explanation

. Lateral collateral ligament (LCL)


Explanation

The terrible triad of the elbow includes an elbow dislocation, radial head fracture, and coronoid fracture. The standard surgical sequence is coronoid fixation, radial head repair/replacement, LCL repair, and finally MCL repair or external fixation only if the elbow remains unstable.