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Elbow & Forearm MCQs

Practice Set 11 of 57

This practice set contains high-yield board review questions covering key concepts in Elbow & Forearm. Each clinical scenario is designed to test your diagnostic and management skills relevant to this subspecialty.

Question 201

Topic: Elbow & Forearm

Which of the following physical examination maneuvers involves resisted extension of the middle finger to specifically isolate the extensor carpi radialis brevis and reproduce lateral epicondylitis pain?

. Cozen's test
. Mill's test
. Maudsley's test
. Chair test
. Hook test

Correct Answer & Explanation

. Maudsley's test

Explanation

Maudsley's test consists of resisted extension of the middle finger with the elbow extended. This maneuver places stress directly on the extensor digitorum communis and the ECRB, reliably reproducing lateral elbow pain.

Question 202

Topic: Elbow & Forearm

A 42-year-old mechanic presents with chronic lateral elbow and proximal forearm pain. Which finding is most indicative of radial tunnel syndrome rather than lateral epicondylitis?

. Maximal tenderness directly on the lateral epicondyle
. Pain reproduced by resisted wrist extension
. Tenderness 4 to 5 cm distal to the lateral epicondyle over the mobile wad
. Pain during passive wrist flexion with the elbow extended
. Complete resolution of symptoms following a local corticosteroid injection at the ECRB origin

Correct Answer & Explanation

. Tenderness 4 to 5 cm distal to the lateral epicondyle over the mobile wad

Explanation

Radial tunnel syndrome is characterized by maximal tenderness over the radial nerve approximately 4 to 5 cm distal to the lateral epicondyle. In contrast, pain directly over the epicondyle is the hallmark of lateral epicondylitis.

Question 203

Topic: Elbow & Forearm

Which of the following is the most accurate statement regarding the use of corticosteroid injections for the treatment of lateral epicondylitis based on current high-level evidence?

. They provide superior long-term outcomes at 1 year compared to physical therapy.
. They are associated with a higher rate of recurrence and worse long-term outcomes than physical therapy or observation.
. They promote tendon healing by reversing angiofibroblastic hyperplasia.
. They are indicated only after 6 months of failed conservative management.
. They are equally effective as platelet-rich plasma (PRP) at 52 weeks.

Correct Answer & Explanation

. They are associated with a higher rate of recurrence and worse long-term outcomes than physical therapy or observation.

Explanation

High-level evidence demonstrates corticosteroid injections provide short-term pain relief but result in higher recurrence rates and worse outcomes at 1 year compared to physical therapy or watchful waiting. They are believed to delay intrinsic tendon healing.

Question 204

Topic: Elbow & Forearm

A 45-year-old male with refractory lateral elbow pain undergoes an MRI. Which MRI finding is most consistent with severe, chronic lateral epicondylitis?

. Bone marrow edema isolated to the capitellum
. Thickening and increased T2 signal intensity at the common extensor origin
. Complete tear of the lateral ulnar collateral ligament with a pristine common extensor
. Loculated fluid within the olecranon bursa
. Hypertrophy and increased signal of the anconeus muscle

Correct Answer & Explanation

. Thickening and increased T2 signal intensity at the common extensor origin

Explanation

On MRI, lateral epicondylitis is characterized by thickening and increased T2 signal intensity at the common extensor origin, specifically the ECRB. These findings correspond to myxoid degeneration and angiofibroblastic tendinosis.

Question 205

Topic: Elbow & Forearm

During an open approach for debridement of the ECRB in lateral epicondylitis, care must be taken to protect the posterior interosseous nerve (PIN). The PIN typically passes between the two heads of which muscle?

. Pronator teres
. Flexor carpi ulnaris
. Extensor carpi radialis brevis
. Supinator
. Extensor digitorum communis

Correct Answer & Explanation

. Supinator

Explanation

The posterior interosseous nerve (PIN) passes under the arcade of Frohse and between the superficial and deep heads of the supinator muscle. It is at risk during extensive deep dissection in the proximal forearm.

Question 206

Topic: Elbow & Forearm

What is a recognized advantage of arthroscopic release of the ECRB over open release for refractory lateral epicondylitis?

. Lower risk of posterior interosseous nerve injury
. Ability to directly inspect the radiocapitellar joint for intra-articular pathology
. Direct visualization and primary repair of the lateral ulnar collateral ligament
. Significantly superior long-term patient-reported outcome scores
. Elimination of the risk of postoperative posterolateral rotatory instability

Correct Answer & Explanation

. Ability to directly inspect the radiocapitellar joint for intra-articular pathology

Explanation

Arthroscopic release allows for direct inspection of the radiocapitellar joint to rule out or treat intra-articular pathology, such as synovial plicae or chondral defects. Long-term functional outcomes are generally comparable between open and arthroscopic techniques.

Question 207

Topic: Elbow & Forearm

According to the Nirschl classification of tendinosis, what characterizes stage 3 lateral epicondylitis?

. Inflammatory changes without any structural tendon alteration
. Angiofibroblastic degeneration without structural rupture
. Structural failure and tendinosis with partial or complete macroscopic rupture
. Fibrosis and dense calcification of the entire tendon origin
. Secondary bony changes with lateral epicondyle spur formation

Correct Answer & Explanation

. Structural failure and tendinosis with partial or complete macroscopic rupture

Explanation

Nirschl stage 3 is defined by structural failure (partial or complete tear) in the setting of angiofibroblastic tendinosis. Stage 1 is inflammatory, and stage 2 is angiofibroblastic degeneration without frank rupture.

Question 208

Topic: Elbow & Forearm

When performing an open Nirschl procedure for lateral epicondylitis, the surgeon splits the common extensor fascia. The pathologic ECRB tissue is found directly deep to which structure(s)?

. Extensor carpi radialis longus (ECRL) and Extensor digitorum communis (EDC)
. Brachioradialis
. Supinator
. Lateral ulnar collateral ligament (LUCL)
. Anconeus

Correct Answer & Explanation

. Extensor carpi radialis longus (ECRL) and Extensor digitorum communis (EDC)

Explanation

The ECRB lies deep to the extensor carpi radialis longus (ECRL) and the extensor digitorum communis (EDC). The standard open approach requires splitting or retracting the ECRL/EDC interval to visualize the degenerated ECRB.

Question 209

Topic: Elbow & Forearm

In the management of lateral epicondylitis, what is the generally accepted minimum duration of failed conservative treatment before surgical intervention is recommended?

. 6 weeks
. 3 months
. 6 to 12 months
. 2 years
. Surgical treatment should be offered immediately if MRI confirms any partial tearing

Correct Answer & Explanation

. 6 to 12 months

Explanation

Surgical management (e.g., ECRB debridement/release) is typically reserved for patients who have failed a comprehensive nonoperative regimen for at least 6 to 12 months. Most cases of lateral epicondylitis resolve with conservative care within this timeframe.

Question 210

Topic: Elbow & Forearm

A patient with lateral epicondylitis is considering injection therapies. How do platelet-rich plasma (PRP) injections compare to corticosteroid injections for this condition based on long-term randomized controlled trials?

. PRP is vastly superior for acute pain relief within the first 2 weeks.
. Corticosteroids provide better overall pain relief and function at 1 to 2 years.
. PRP provides significantly better pain reduction and functional improvement at 1 to 2 years.
. There is no functional difference between the two treatments at any time point.
. Corticosteroids promote superior macroscopic structural healing on postoperative MRI.

Correct Answer & Explanation

. PRP provides significantly better pain reduction and functional improvement at 1 to 2 years.

Explanation

Studies demonstrate that while corticosteroids offer better short-term relief, PRP yields significantly better pain and functional outcomes at intermediate and long-term follow-ups (1 to 2 years). Corticosteroids are associated with a higher long-term recurrence rate.

Question 211

Topic: Elbow & Forearm

An open lateral epicondyle release is planned. To accurately identify the ECRB, the surgeon assesses its origin relative to the ECRL. What is the spatial relationship of the ECRL origin to the ECRB origin?

. The ECRL originates proximally on the lateral supracondylar ridge.
. The ECRL originates directly distal to the ECRB on the lateral epicondyle.
. The ECRL originates posterior to the ECRB, blending directly with the triceps fascia.
. The ECRL originates deep to the ECRB on the lateral joint capsule.
. The ECRL originates anterior to the ECRB from the coronoid process.

Correct Answer & Explanation

. The ECRL originates proximally on the lateral supracondylar ridge.

Explanation

The Extensor Carpi Radialis Longus (ECRL) originates proximally on the lateral supracondylar ridge. The ECRB originates slightly distal to this, directly on the lateral epicondyle, which helps the surgeon differentiate the two during dissection.

Question 212

Topic: Elbow & Forearm

What is the most characteristic finding of lateral epicondylitis on a high-resolution musculoskeletal ultrasound?

. A thin, homogeneously hyper-reflective common extensor tendon
. Focal hypoechoic areas, tendon thickening, and increased Doppler flow at the ECRB origin
. A large anechoic cyst compressing the posterior interosseous nerve
. Hyperechoic shadowing strictly confined to the brachioradialis muscle belly
. Diffuse atrophy and fatty infiltration of the extensor carpi ulnaris

Correct Answer & Explanation

. Focal hypoechoic areas, tendon thickening, and increased Doppler flow at the ECRB origin

Explanation

On ultrasound, lateral epicondylitis (tendinosis) is characterized by thickening of the common extensor tendon and focal hypoechoic regions representing myxoid degeneration. Neovascularization is also frequently demonstrated by increased color Doppler signal.

Question 213

Topic: Elbow & Forearm

Following an open ECRB debridement and repair for recalcitrant lateral epicondylitis, which of the following represents the most appropriate initial postoperative rehabilitation protocol?

. Immediate aggressive active wrist extension exercises against resistance on postoperative day 1
. Rigid immobilization in 90 degrees of flexion with the wrist in full flexion for 6 weeks
. Brief immobilization for 1-2 weeks followed by gentle active range of motion and progressive strengthening at 4-6 weeks
. Strict cast immobilization for 8 weeks followed by manipulation under anesthesia
. Immediate return to full sports activities utilizing a counterforce brace

Correct Answer & Explanation

. Brief immobilization for 1-2 weeks followed by gentle active range of motion and progressive strengthening at 4-6 weeks

Explanation

Postoperative protocols typically involve a brief period of rest or splinting for 7-14 days to allow soft tissue healing. This is followed by a gradual progression of stretching and gentle active ROM, delaying heavy resistance training until 4-6 weeks.

Question 214

Topic: Elbow & Forearm

Tissue sampled during operative debridement of refractory lateral epicondylitis will most likely demonstrate which of the following histologic findings?

. Acute inflammatory infiltrate with dense neutrophil accumulation
. Angiofibroblastic hyperplasia with disorganized collagen
. Granulomatous inflammation with multinucleated giant cells
. Chondroid metaplasia with focal dystrophic calcification
. Fibrinoid necrosis with transmural vasculitis

Correct Answer & Explanation

. Angiofibroblastic hyperplasia with disorganized collagen

Explanation

Lateral epicondylitis is a degenerative tendinopathy (tendinosis) rather than a true inflammatory process. Histology classically shows angiofibroblastic hyperplasia, characterized by disorganized collagen, increased fibroblasts, and vascular hyperplasia without acute inflammatory cells.

Question 215

Topic: Elbow & Forearm

A 45-year-old man undergoes an open debridement of the extensor carpi radialis brevis (ECRB) origin for recalcitrant lateral epicondylitis. Postoperatively, he complains of lateral elbow pain and mechanical clicking when pushing up from a chair. Injury to which of the following structures during the surgical approach is the most likely cause of his new symptoms?

. Annular ligament
. Radial collateral ligament
. Lateral ulnar collateral ligament
. Interosseous membrane
. Extensor digitorum communis

Correct Answer & Explanation

. Lateral ulnar collateral ligament

Explanation

The lateral ulnar collateral ligament (LUCL) is the primary restraint to posterolateral rotatory instability (PLRI) of the elbow. Iatrogenic injury to the LUCL can occur during ECRB debridement if the dissection extends too posterior or deep, resulting in symptomatic PLRI.

Question 216

Topic: Elbow & Forearm

A 40-year-old recreational tennis player is diagnosed with lateral epicondylitis. He is considering a corticosteroid injection. Based on high-level evidence, what should the patient be counseled regarding the use of corticosteroid injections compared to physical therapy or watchful waiting?

. Superior short-term and long-term pain relief
. Superior short-term relief but higher recurrence and worse long-term outcomes at 1 year
. Inferior short-term relief but superior long-term outcomes at 1 year
. No difference in short-term or long-term outcomes
. Decreased risk of tendon rupture compared to conservative management

Correct Answer & Explanation

. Superior short-term relief but higher recurrence and worse long-term outcomes at 1 year

Explanation

Multiple randomized controlled trials have shown that corticosteroid injections for lateral epicondylitis provide superior short-term pain relief (at 4-6 weeks). However, they result in higher recurrence rates and worse long-term outcomes (at 1 year) compared to physical therapy or watchful waiting.

Question 217

Topic: Elbow & Forearm

During an arthroscopic release for lateral epicondylitis, the surgeon views the lateral compartment from the proximal anteromedial portal. The diseased ECRB tendon is identified. What is the correct anatomic relationship of the ECRB tendon in this region?

. Intra-articular, deep to the joint capsule
. Extra-articular, superficial to the joint capsule and deep to the extensor digitorum communis
. Extra-articular, superficial to the joint capsule and superficial to the extensor carpi radialis longus
. Intra-articular, piercing the annular ligament
. Extra-articular, intimately blended with the insertion of the brachialis tendon

Correct Answer & Explanation

. Extra-articular, superficial to the joint capsule and deep to the extensor digitorum communis

Explanation

Arthroscopically, the ECRB origin is located extra-articularly. It lies immediately superficial to the anterolateral joint capsule and deep to the extensor digitorum communis (EDC) and extensor carpi radialis longus (ECRL).

Question 218

Topic: Elbow & Forearm

A 38-year-old carpenter has persistent lateral elbow pain that has failed 6 months of eccentric exercise therapy. Physical examination reveals a positive apprehension test when applying a valgus, axial, and supination force to the elbow during flexion. MRI shows a partial tear of the common extensor origin. What concurrent MRI finding is most likely present given the examination?

. Hyperintensity and thickening of the radial nerve in the arcade of Frohse
. Edema at the supinator crest of the ulna and a tear of the LUCL
. Osteochondral defect of the capitellum
. Hypertrophy of the anconeus muscle
. Fluid within the olecranon bursa

Correct Answer & Explanation

. Edema at the supinator crest of the ulna and a tear of the LUCL

Explanation

The physical examination describes a positive posterolateral rotatory instability (PLRI) apprehension test. PLRI is caused by insufficiency of the lateral ulnar collateral ligament (LUCL), which originates near the common extensor origin and inserts on the supinator crest of the ulna.

Question 219

Topic: Elbow & Forearm

A surgeon performs an open surgical release of the common extensor origin for chronic lateral epicondylitis. To minimize the risk of iatrogenic injury to the posterior interosseous nerve (PIN), the deep distal dissection should generally remain proximal to which of the following anatomic landmarks?

. The arcade of Frohse
. The equator of the radial head
. The annular ligament
. The bicipital tuberosity
. The lateral supracondylar ridge

Correct Answer & Explanation

. The equator of the radial head

Explanation

The posterior interosseous nerve (PIN) crosses the radiocapitellar joint and enters the supinator muscle. To avoid PIN injury during open lateral epicondylar release, dissection should safely remain proximal to the equator (mid-portion) of the radial head.

Question 220

Topic: Elbow & Forearm

A 42-year-old male with an 18-month history of lateral epicondylitis presents for surgical consultation. He has failed physical therapy, bracing, and a PRP injection. He undergoes an isolated arthroscopic ECRB release. Which of the following best describes the expected postoperative recovery and outcome?

. Immediate return to heavy lifting within 2 weeks with a near 100% success rate
. Requirement for 6 weeks of strict cast immobilization to allow tendon healing
. Gradual return to activities over 3-6 months with an expected success rate of approximately 80%
. Permanent 30% reduction in grip strength is a guaranteed outcome of the release
. High likelihood (>50%) of requiring revision surgery within 2 years due to recurrent tendinosis

Correct Answer & Explanation

. Gradual return to activities over 3-6 months with an expected success rate of approximately 80%

Explanation

Operative treatment for lateral epicondylitis via open or arthroscopic ECRB release yields a good to excellent outcome in 70-85% of properly selected patients. Recovery is progressive, with return to unrestricted heavy activities typically taking 3 to 6 months.

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