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9. Shoulder and Elbow MCQs

Practice Set 181 of 197

This practice set contains high-yield board review questions covering key concepts in 9. Shoulder and Elbow. Each clinical scenario is designed to test your diagnostic and management skills relevant to this subspecialty.

Question 3601

Topic: 9. Shoulder and Elbow

Regarding the pathophysiology of lateral epicondylitis, which of the following statements is most accurate?

. It is primarily an inflammatory condition, hence the suffix '-itis'.
. It involves microscopic tearing and degenerative changes in the tendon, often referred to as tendinosis.
. It is caused by direct trauma to the lateral epicondyle.
. It is an autoimmune disorder affecting tendon integrity.
. It is a calcific deposit within the tendon, similar to calcific tendinitis of the shoulder.

Correct Answer & Explanation

. It involves microscopic tearing and degenerative changes in the tendon, often referred to as tendinosis.

Explanation

Despite the historical term 'epicondylitis,' the underlying pathology of chronic lateral epicondylitis is primarily degenerative, involving microscopic tearing, collagen disorganization, and angiofibroblastic hyperplasia, a process best described as tendinosis. There is typically an absence of acute inflammatory cells. While direct trauma can initiate symptoms, it's not the primary underlying cause of the chronic degenerative changes. It is not an autoimmune disorder, nor is calcification the primary pathology.

Question 3602

Topic: Elbow & Forearm

What is the typical sensory deficit, if any, associated with a true lateral epicondylitis?

. Numbness in the little finger and ulnar half of the ring finger.
. Hypesthesia in the dorsal web space of the thumb and index finger.
. Decreased sensation along the lateral forearm.
. No specific sensory deficit.
. Paresthesias in the thumb, index, and middle fingers.

Correct Answer & Explanation

. No specific sensory deficit.

Explanation

Lateral epicondylitis is a tendinopathy and does not directly cause specific sensory nerve deficits. If sensory changes are present, they point towards a differential diagnosis such as cervical radiculopathy (C6-C7), radial tunnel syndrome (though primarily motor), or less commonly, superficial radial nerve entrapment (which would cause sensory changes on the dorsal thumb/index finger). Therefore, a pure lateral epicondylitis, without nerve involvement, should present with no specific sensory deficits.

Question 3603

Topic: Elbow & Forearm

When evaluating a patient with suspected lateral epicondylitis, which observation, if present, would most strongly suggest an alternative diagnosis such as radiohumeral osteoarthritis?

. Pain with resisted wrist extension.
. Point tenderness over the lateral epicondyle.
. Crepitus and pain with forearm pronation/supination.
. Pain relief with rest.
. Weak grip strength.

Correct Answer & Explanation

. Crepitus and pain with forearm pronation/supination.

Explanation

While pain with resisted wrist extension and point tenderness are hallmarks of lateral epicondylitis, crepitus and pain specifically with forearm pronation and supination are highly indicative of intra-articular pathology, such as radiohumeral osteoarthritis, or possibly a plica. These mechanical symptoms are less typical for isolated tendinopathy. Pain relief with rest and weak grip strength can be present in both conditions to varying degrees.

Question 3604

Topic: Elbow & Forearm

Which of the following laboratory tests is most helpful in the routine diagnosis and workup of lateral epicondylitis?

. Erythrocyte Sedimentation Rate (ESR)
. C-Reactive Protein (CRP)
. Rheumatoid Factor (RF)
. Complete Blood Count (CBC)
. None of the above

Correct Answer & Explanation

. None of the above

Explanation

Lateral epicondylitis is a clinical diagnosis based on history and physical examination. There are no specific laboratory tests that diagnose or are routinely helpful in the workup of uncomplicated lateral epicondylitis. ESR, CRP, and RF might be considered if an inflammatory arthropathy is suspected as a differential, but not for typical lateral epicondylitis. CBC is a general health screen. Therefore, none of the listed tests are routinely indicated.

Question 3605

Topic: 9. Shoulder and Elbow

When advising a patient on activity modification for lateral epicondylitis, which type of activity should be MOST emphasized to reduce strain on the ECRB?

. Avoiding heavy lifting with the elbow flexed.
. Minimizing repetitive elbow flexion and extension.
. Reducing activities that involve forceful wrist extension or gripping with the wrist extended.
. Limiting shoulder abduction beyond 90 degrees.
. Avoiding direct pressure on the ulnar nerve at the elbow.

Correct Answer & Explanation

. Reducing activities that involve forceful wrist extension or gripping with the wrist extended.

Explanation

The ECRB is a primary wrist extensor. Activities involving forceful wrist extension, especially combined with gripping (e.g., hammering, tennis backhand, using a screwdriver), significantly load the ECRB origin and are the main aggravators of lateral epicondylitis. Reducing these activities is paramount for activity modification. The other options pertain to different elbow/shoulder pathologies or nerve entrapments.

Question 3606

Topic: Elbow & Forearm

What is the typical age range for patients presenting with lateral epicondylitis?

. Adolescence (10-18 years old)
. Young adults (19-25 years old)
. Middle-aged adults (30-60 years old)
. Elderly (over 70 years old)
. Infants and toddlers

Correct Answer & Explanation

. Middle-aged adults (30-60 years old)

Explanation

Lateral epicondylitis is most prevalent in middle-aged adults, typically between 30 and 60 years old, with a peak incidence in the 4th and 5th decades of life. It is less common in younger individuals and generally not seen in infants or toddlers. While elderly individuals can develop it, the peak incidence is earlier.

Question 3607

Topic: 9. Shoulder and Elbow

Following surgical debridement for chronic lateral epicondylitis, which of the following is an expected post-operative rehabilitation goal during the early phase (first 2-4 weeks)?

. Initiating heavy eccentric wrist strengthening exercises.
. Immediate return to sport-specific activities.
. Restoration of full, pain-free elbow range of motion.
. Aggressive passive stretching into wrist flexion.
. Removal of external sutures/staples and wound care.

Correct Answer & Explanation

. Restoration of full, pain-free elbow range of motion.

Explanation

In the early post-operative phase (2-4 weeks), the primary goals are pain control, wound healing (suture/staple removal is often around 10-14 days, not the sole goal for 2-4 weeks), and gradual restoration of pain-free elbow range of motion. Heavy eccentric wrist strengthening and immediate return to sport are delayed until the later stages of rehabilitation to allow for adequate healing and tissue maturation. Aggressive passive stretching can be counterproductive and potentially re-injure the healing tissue.

Question 3608

Topic: 9. Shoulder and Elbow
When considering the use of Platelet-Rich Plasma (PRP) for lateral epicondylitis, what is the primary proposed mechanism of action?
. Direct analgesic effect from the injected plasma.
. Anti-inflammatory properties of concentrated platelets.
. Delivery of growth factors to stimulate tendon healing and regeneration.
. Mechanical disruption of calcific deposits.
. Neurolysis of peripheral nerves at the elbow.

Correct Answer & Explanation

. Delivery of growth factors to stimulate tendon healing and regeneration.

Explanation

The primary proposed mechanism of action for Platelet-Rich Plasma (PRP) in tendinopathy is the delivery of concentrated growth factors (e.g., PDGF, TGF-β, VEGF, IGF-1) released from activated platelets. These growth factors are believed to stimulate cellular proliferation, collagen synthesis, and neovascularization, thereby promoting tissue healing and regeneration rather than just providing analgesia or anti-inflammatory effects (which are secondary or debated).

Question 3609

Topic: Elbow & Forearm

Which component of the lateral collateral ligament complex is most important for resisting varus stress at the elbow?

. Annular ligament
. Accessory collateral ligament
. Lateral ulnar collateral ligament (LUCL)
. Radial collateral ligament
. Oblique ligament

Correct Answer & Explanation

. Radial collateral ligament

Explanation

The Radial Collateral Ligament (RCL) is the primary static stabilizer against varus stress at the elbow. The Annular Ligament stabilizes the radial head. The Lateral Ulnar Collateral Ligament (LUCL) is critical for posterolateral rotatory stability. The accessory collateral ligament provides additional support. While the question asks about lateral epicondylitis, a thorough examiner will know surrounding anatomy and potential differential diagnoses involving instability. The Radial Collateral Ligament originates from the lateral epicondyle, making it relevant to the region, though LUCL is more important for posterolateral instability.

Question 3610

Topic: Elbow & Forearm

A high-resolution musculoskeletal ultrasound for a patient with chronic lateral epicondylitis is most likely to reveal which of the following findings?

. Joint effusion within the radiohumeral joint.
. Hypoechoic thickening of the common extensor tendon, often with neovascularization.
. Complete rupture of the ECRB tendon with retraction.
. Anterior dislocation of the radial head.
. Calcification within the ulnar collateral ligament.

Correct Answer & Explanation

. Hypoechoic thickening of the common extensor tendon, often with neovascularization.

Explanation

Musculoskeletal ultrasound in chronic lateral epicondylitis commonly shows hypoechoic (darker) thickening and disorganization of the common extensor tendon, particularly at the ECRB origin. Doppler ultrasound can also reveal neovascularization (increased blood flow), which is thought to be associated with pain. Joint effusion and radial head dislocation are unrelated. Complete rupture is rare. Calcification in the ulnar collateral ligament indicates medial elbow pathology.

Question 3611

Topic: 9. Shoulder and Elbow

What is the primary goal of initial rest and activity modification for a patient diagnosed with acute lateral epicondylitis?

. To prevent progression to surgery.
. To completely immobilize the elbow joint.
. To reduce the mechanical load on the healing tendon and allow symptomatic relief.
. To strengthen the surrounding musculature to compensate for the injured tendon.
. To stretch the affected tendon to improve flexibility.

Correct Answer & Explanation

. To reduce the mechanical load on the healing tendon and allow symptomatic relief.

Explanation

The primary goal of initial rest and activity modification is to reduce the mechanical load and repetitive strain on the inflamed/degenerative common extensor tendon origin. This aims to decrease pain, prevent further microtrauma, and create an environment conducive to healing. Complete immobilization is rarely indicated and can lead to stiffness. Strengthening and stretching are part of later-stage rehabilitation, not the immediate goal of rest.

Question 3612

Topic: Elbow & Forearm

Which occupational factor is most strongly associated with an increased risk of developing lateral epicondylitis?

. Prolonged static posture.
. Repetitive, forceful gripping combined with wrist extension/pronation.
. Frequent overhead reaching.
. Exposure to cold temperatures.
. Minimal use of hand tools.

Correct Answer & Explanation

. Repetitive, forceful gripping combined with wrist extension/pronation.

Explanation

Occupational factors involving repetitive, forceful gripping, especially when combined with wrist extension and/or forearm pronation (e.g., using heavy hand tools, assembly line work), are strongly associated with an increased risk of lateral epicondylitis due to the excessive strain placed on the common extensor origin, particularly the ECRB. Prolonged static posture and cold exposure are less directly implicated. Frequent overhead reaching can contribute to shoulder issues but less directly to lateral epicondylitis. Minimal tool use would decrease risk.

Question 3613

Topic: Elbow & Forearm

A patient with lateral epicondylitis also presents with significant weakness in wrist extension and finger extension, with minimal pain. The most likely concomitant diagnosis is:

. Radial tunnel syndrome
. Cervical disc herniation (C7 radiculopathy)
. Posterior interosseous nerve (PIN) entrapment
. Medial epicondylitis
. Elbow fracture

Correct Answer & Explanation

. Posterior interosseous nerve (PIN) entrapment

Explanation

Significant weakness in wrist extension and finger extension, especially with minimal pain, is a hallmark of Posterior Interosseous Nerve (PIN) entrapment. The PIN is a purely motor nerve, and its compression leads to weakness in the muscles it innervates (wrist extensors, finger extensors) without sensory deficits. While radial tunnel syndrome encompasses PIN entrapment, PIN entrapment specifically highlights the motor weakness. Cervical radiculopathy could cause weakness but usually involves more widespread neurological symptoms and pain. Medial epicondylitis is on the opposite side. An elbow fracture would have acute pain and swelling.

Question 3614

Topic: Elbow & Forearm

Which injection type has been shown in some studies to have superior long-term outcomes compared to corticosteroid injections for chronic lateral epicondylitis?

. Local anesthetic (lidocaine) alone.
. Hyaluronic acid injection.
. Botulinum toxin injection.
. Platelet-Rich Plasma (PRP) injection.
. Prolotherapy (dextrose solution) injection.

Correct Answer & Explanation

. Platelet-Rich Plasma (PRP) injection.

Explanation

While corticosteroid injections can provide short-term pain relief, several studies have demonstrated that Platelet-Rich Plasma (PRP) injections may offer superior long-term outcomes for chronic lateral epicondylitis, likely due to their role in stimulating tendon healing and regeneration. Local anesthetics provide only temporary relief. Hyaluronic acid and prolotherapy have less robust evidence for superiority in lateral epicondylitis compared to PRP. Botulinum toxin can reduce muscle activity but its long-term efficacy over corticosteroids is not clearly established as superior and side effects like temporary weakness are common.

Question 3615

Topic: 9. Shoulder and Elbow

When performing a 'grip strength' test in a patient with lateral epicondylitis, which observation is typically expected?

. Symmetrically reduced grip strength bilaterally.
. Increased grip strength due to compensatory muscle activation.
. Significantly reduced grip strength on the affected side, particularly with the elbow extended.
. Normal grip strength on the affected side.
. Reduced grip strength primarily in the little finger.

Correct Answer & Explanation

. Significantly reduced grip strength on the affected side, particularly with the elbow extended.

Explanation

Patients with lateral epicondylitis typically experience significantly reduced grip strength on the affected side, especially when the elbow is extended, as this position places more tension on the common extensor origin. This is often due to pain inhibition rather than true muscle weakness. Symmetrically reduced strength or normal strength would be atypical for an affected unilateral condition. Reduced strength only in the little finger would suggest ulnar nerve involvement.

Question 3616

Topic: Elbow & Forearm

What is the typical timeframe for considering surgical intervention for lateral epicondylitis after exhausting non-operative treatments?

. Within 3 months of diagnosis.
. After 6-12 weeks of symptoms.
. After 6-12 months of failed non-operative management.
. Only if imaging shows a complete tendon rupture.
. Immediately after diagnosis in athletes.

Correct Answer & Explanation

. After 6-12 months of failed non-operative management.

Explanation

Surgical intervention for lateral epicondylitis is typically considered for chronic, recalcitrant cases that have failed a comprehensive trial of non-operative management for at least 6 to 12 months. This allows sufficient time for various conservative treatments to have an effect. Surgery is not indicated within the first few months, nor is it reserved only for complete ruptures (which are rare), or performed immediately, even in athletes, unless it's a very specific, rare acute injury.

Question 3617

Topic: Elbow & Forearm

A 45-year-old patient presents with pain at the lateral epicondyle. During examination, you note that resisted wrist extension causes pain, but resisted long finger extension (Maudsley's test) is negative. What is the most likely implication of this finding?

. The patient likely has radial tunnel syndrome rather than lateral epicondylitis.
. The ECRB is unaffected, and another wrist extensor is the primary pathology.
. It suggests a less severe form of lateral epicondylitis, or atypical involvement.
. The patient is malingering.
. This pattern indicates primary involvement of the extensor digiti minimi.

Correct Answer & Explanation

. The ECRB is unaffected, and another wrist extensor is the primary pathology.

Explanation

While both Cozen's (resisted wrist extension) and Maudsley's (resisted long finger extension) tests target the common extensor origin, a positive Cozen's and negative Maudsley's suggests that the primary pathology is more specifically affecting the ECRB or ECRL rather than the Extensor Digitorum Communis (EDC), which is specifically stressed by Maudsley's test. It doesn't necessarily rule out lateral epicondylitis but might indicate a less widespread or atypical involvement of the common extensor origin. It does not directly point to radial tunnel syndrome, nor does it imply malingering. The ECRB is part of the common extensor origin, so it's not unaffected. EDC and ECRB are distinct but share a common origin.

Question 3618

Topic: Elbow & Forearm

Which of the following physical therapy modalities has the strongest evidence for long-term efficacy in the treatment of chronic lateral epicondylitis?

. Therapeutic ultrasound (pulsed mode).
. Hot packs and cold packs.
. Transcutaneous Electrical Nerve Stimulation (TENS).
. Eccentric strengthening exercises of the wrist extensors.
. Deep tissue massage to the forearm extensors.

Correct Answer & Explanation

. Eccentric strengthening exercises of the wrist extensors.

Explanation

Of the listed modalities, eccentric strengthening exercises of the wrist extensors have the strongest evidence for long-term efficacy in the treatment of chronic tendinopathies, including lateral epicondylitis. These exercises are thought to promote collagen remodeling and increase the tendon's load-bearing capacity. The evidence for therapeutic ultrasound, TENS, and passive modalities like hot/cold packs and massage for long-term benefit is less robust or primarily for short-term pain relief.

Question 3619

Topic: 9. Shoulder and Elbow

A patient undergoing physical therapy for lateral epicondylitis is struggling with pain during daily activities despite an appropriate exercise regimen. The therapist notes that the patient's job involves frequent use of a heavy stapler. What would be the most important adjustment to recommend?

. Increase the intensity of eccentric exercises.
. Switch to a heavier stapler to build strength.
. Suggest using the unaffected hand or modifying the stapler for reduced force/different grip.
. Recommend immediate corticosteroid injection.
. Advise complete immobilization of the wrist and elbow.

Correct Answer & Explanation

. Suggest using the unaffected hand or modifying the stapler for reduced force/different grip.

Explanation

If a specific activity like using a heavy stapler consistently aggravates symptoms, the most important adjustment is activity modification. This could involve using the unaffected hand, finding an alternative tool that requires less force, or modifying the grip/technique. Increasing exercise intensity when pain is already problematic would be counterproductive. Immediate injection is often considered after failed conservative measures, but activity modification is a primary conservative step. Complete immobilization is generally not indicated and can lead to stiffness.

Question 3620

Topic: Elbow & Forearm

Which statement best describes the role of surgical management for lateral epicondylitis?

. It is the first-line treatment for most patients.
. It is reserved for patients with severe pain and functional limitation who have failed at least 3 months of non-operative treatment.
. It primarily involves reattaching a completely ruptured ECRB tendon.
. It is typically considered for recalcitrant cases after 6-12 months of failed conservative management.
. It guarantees complete resolution of pain and full return to prior activity levels.

Correct Answer & Explanation

. It is typically considered for recalcitrant cases after 6-12 months of failed conservative management.

Explanation

Surgical management for lateral epicondylitis is reserved for chronic, recalcitrant cases that have failed a prolonged course (typically 6-12 months) of comprehensive non-operative treatment, including physical therapy, activity modification, and sometimes injections. It is not first-line, and complete rupture is rare. While often successful, surgery does not guarantee complete pain resolution or full return to prior activity for all patients.

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