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Question 2081

Topic: Elbow & Forearm

An 8-year-old boy falls on an outstretched hand and sustains a fracture of the radial neck. Radiographs demonstrate 50 degrees of angulation.

What is the most appropriate initial step in management?

. Immobilization in a long arm cast without reduction
. Closed reduction under conscious sedation
. Immediate open reduction and internal fixation
. Excision of the radial head
. Application of a dynamic external fixator

Correct Answer & Explanation

. Immobilization in a long arm cast without reduction


Explanation

For pediatric radial neck fractures, angulation greater than 30 degrees typically requires reduction to restore forearm rotation. Initial management should be a closed reduction, followed by percutaneous manipulation or intramedullary pinning if closed reduction fails.

Question 2082

Topic: 9. Shoulder and Elbow

A 76-year-old woman presents with severe right shoulder pain and an inability to actively elevate her arm above 60 degrees. Passive elevation is preserved to 150 degrees. Radiographs demonstrate a superiorly migrated humeral head with articulation against the acromion and severe glenohumeral osteoarthritis. What is the most appropriate definitive surgical management?

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

Correct Answer & Explanation

. Arthroscopic rotator cuff repair


Explanation

This patient has rotator cuff tear arthropathy with pseudoparalysis. Reverse total shoulder arthroplasty is the treatment of choice, as it relies on the deltoid rather than the deficient rotator cuff to restore forward elevation.

Question 2083

Topic: Shoulder Arthroplasty & Arthritis

A 58-year-old woman sustains a severely displaced 4-part proximal humerus fracture. The humeral head is noted to be entirely devascularized on advanced imaging. When comparing hemiarthroplasty to reverse total shoulder arthroplasty (RTSA) for this patient, RTSA has been shown in the literature to provide which of the following advantages?

. Lower complication rate
. Decreased operative time
. More predictable active forward elevation
. Better restoration of anatomic tuberosity footprint
. Lower rate of scapular notching

Correct Answer & Explanation

. Lower complication rate


Explanation

In elderly patients with 4-part proximal humerus fractures, RTSA provides more predictable active forward elevation and better functional outcomes compared to hemiarthroplasty, primarily because RTSA outcomes are less reliant on the anatomic healing of the tuberosities.

Question 2084

Topic: 9. Shoulder and Elbow

In evaluating a patient with suspected acromioclavicular (AC) joint arthritis versus superior labral pathology, the cross-body adduction test is performed. If the AC joint is the primary pain generator, where is the pain most predictably localized during this maneuver?

. Deep within the glenohumeral joint
. Radiating down the lateral aspect of the arm to the deltoid insertion
. Directly over the superior aspect of the shoulder at the AC joint
. Posteriorly along the spine of the scapula
. Anteriorly in the bicipital groove

Correct Answer & Explanation

. Deep within the glenohumeral joint


Explanation

The cross-body adduction test compresses the acromioclavicular joint. Pain localized specifically to the top of the shoulder over the AC joint indicates AC joint pathology, whereas deep glenohumeral pain may suggest labral or capsular issues.

Question 2085

Topic: 9. Shoulder and Elbow

A 72-year-old man presents with chronic shoulder pain and an inability to actively elevate his arm beyond 40 degrees. Radiographs demonstrate superior migration of the humeral head articulating with the acromion and acetabularization of the coracoacromial arch. The patient is diagnosed with rotator cuff tear arthropathy. What is the most appropriate surgical treatment?

. Total shoulder arthroplasty
. Reverse total shoulder arthroplasty
. Hemiarthroplasty with concentric reaming
. Arthroscopic superior capsule reconstruction
. Arthroscopic rotator cuff repair

Correct Answer & Explanation

. Total shoulder arthroplasty


Explanation

Reverse total shoulder arthroplasty is the gold standard treatment for rotator cuff tear arthropathy with pseudoparalysis. It medializes and distalizes the center of rotation to optimize the deltoid lever arm, restoring active elevation.

Question 2086

Topic: Shoulder Arthroplasty & Arthritis

A patient is evaluated 2 years after receiving a reverse total shoulder arthroplasty (RTSA). Radiographs reveal a progressive lucency and bone loss on the inferior scapular neck. What is the primary mechanical cause of this scapular notching?

. Impingement of the greater tuberosity on the acromion
. Impingement of the humeral polyethylene cup on the inferior scapular neck
. Osteolysis secondary to polyethylene wear debris
. Subscapularis failure with anterior subluxation
. Glenosphere baseplate screw pullout

Correct Answer & Explanation

. Impingement of the greater tuberosity on the acromion


Explanation

Scapular notching after RTSA is primarily caused by mechanical impingement of the medial humeral metaphysis or polyethylene liner against the inferior scapular neck during adduction. Inferior baseplate positioning and lateralization can help minimize this risk.

Question 2087

Topic: 9. Shoulder and Elbow

A 50-year-old woman with poorly controlled type 1 diabetes mellitus presents with a 5-month history of insidious, severe, diffuse shoulder pain and progressive loss of both active and passive range of motion. Examination shows symmetric restriction in all planes. Which clinical phase of adhesive capsulitis is she currently in?

. Pre-freezing phase
. Freezing phase
. Frozen phase
. Thawing phase
. Resolution phase

Correct Answer & Explanation

. Pre-freezing phase


Explanation

Adhesive capsulitis progresses through three main stages. The "freezing" phase (typically lasting 2-9 months) is characterized by severe, progressive pain and stiffness. The subsequent "frozen" phase is marked by profound stiffness but gradually subsiding pain.

Question 2088

Topic: 9. Shoulder and Elbow

A 70-year-old man presents with an irreparable massive rotator cuff tear. He demonstrates pseudoparalysis with active forward elevation limited to 40 degrees, but his passive range of motion is fully preserved. His deltoid function is intact. What is the most appropriate surgical treatment?

. Arthroscopic superior capsule reconstruction
. Reverse total shoulder arthroplasty
. Latissimus dorsi tendon transfer
. Anatomic total shoulder arthroplasty
. Pectoralis major tendon transfer

Correct Answer & Explanation

. Arthroscopic superior capsule reconstruction


Explanation

Reverse total shoulder arthroplasty relies on a functioning deltoid to restore active elevation in patients with a deficient rotator cuff. It is the treatment of choice for elderly patients with massive, irreparable rotator cuff tears and pseudoparalysis with preserved passive motion.

Question 2089

Topic: 9. Shoulder and Elbow

A 72-year-old woman presents with severe shoulder pain and inability to elevate her arm actively past 40 degrees. Radiographs demonstrate superior migration of the humeral head with an acromiohumeral distance of 2 mm and mild glenohumeral osteoarthritis. What is the most appropriate definitive surgical management?

. Rotator cuff repair with acromioplasty
. Hemiarthroplasty
. Anatomic total shoulder arthroplasty
. Reverse total shoulder arthroplasty
. Latissimus dorsi tendon transfer

Correct Answer & Explanation

. Rotator cuff repair with acromioplasty


Explanation

Reverse total shoulder arthroplasty is indicated for cuff tear arthropathy and pseudoparalysis in the elderly, relying on the deltoid for elevation. Anatomic TSA is contraindicated due to the absence of a functional rotator cuff.

Question 2090

Topic: 9. Shoulder and Elbow

A 28-year-old weightlifter presents with acute anterior shoulder pain and a visible bulge in his arm after a heavy bench press. Examination reveals weakness in adduction and internal rotation. MRI confirms a complete tear of the pectoralis major tendon at its insertion. What is the recommended treatment?

. Nonoperative management with early mobilization
. Surgical repair via a deltopectoral approach
. Surgical repair via an axillary approach
. Corticosteroid injection and physical therapy
. Tendon transfer using the short head of the biceps

Correct Answer & Explanation

. Nonoperative management with early mobilization


Explanation

Complete tears of the pectoralis major tendon at the humeral insertion in active individuals should be surgically repaired to restore strength, typically via a deltopectoral approach. Nonoperative treatment results in cosmetic deformity and significant weakness.

Question 2091

Topic: Shoulder Arthroplasty & Arthritis

A 78-year-old woman presents with a 4-part proximal humerus fracture. She has severe osteoporosis and a sedentary lifestyle. The fracture involves significant displacement of the tuberosities and valgus impaction of the humeral head. Which of the following is the primary advantage of reverse total shoulder arthroplasty (RTSA) over hemiarthroplasty for this patient?

. Less risk of infection
. Lower intraoperative blood loss
. Outcomes are less dependent on tuberosity healing
. Preservation of the native glenoid articular cartilage
. Shorter surgical time

Correct Answer & Explanation

. Less risk of infection


Explanation

The primary advantage of RTSA over hemiarthroplasty for complex proximal humerus fractures in the elderly is that functional outcomes are less dependent on anatomic tuberosity healing. The reverse prosthesis design relies primarily on the deltoid muscle for elevation.

Question 2092

Topic: 9. Shoulder and Elbow

A 74-year-old woman with severe osteoporosis sustains a 4-part proximal humerus fracture. She has a documented history of a massive, retracted, and irreparable rotator cuff tear on the same side. The most appropriate surgical treatment is:

. Open reduction and internal fixation with a locking plate
. Hemiarthroplasty with tuberosity repair
. Reverse total shoulder arthroplasty
. Anatomic total shoulder arthroplasty
. Nonoperative management with a sling

Correct Answer & Explanation

. Open reduction and internal fixation with a locking plate


Explanation

Reverse total shoulder arthroplasty is indicated for older patients with complex proximal humerus fractures and concurrent rotator cuff arthropathy. It relies on the deltoid for overhead function and has more reliable outcomes than hemiarthroplasty when tuberosity healing is compromised.

Question 2093

Topic: 9. Shoulder and Elbow

A 12-year-old pitcher has had a 2-month history of pain in his right dominant shoulder after throwing. He reports that the pain has gradually progressed to the point where he cannot throw without pain. He also notes that the pain now awakens him at night if he has been active. Anti-inflammatory drugs have failed to provide relief. Examination reveals no abnormalities except for some localized tenderness over the proximal humerus. Figures 32a and 32b show radiographs of both shoulders. What is the most likely diagnosis?

. Chondroblastoma
. Osteoid osteoma
. Occult instability
. Rotator cuff tear
. Injury to the proximal humeral physis

Correct Answer & Explanation

. Chondroblastoma


Explanation

The history, examination, and radiographs are pathognomonic for Little League shoulder, a stress syndrome of the proximal humeral physis caused by overuse. Complete fracture rarely occurs, and recovery usually occurs with rest. Night pain is always a serious concern and further work-up is needed if the patient does not respond to activity modification. Occult instability is not a real concern in this patient, although it should be included in the differential diagnosis. Albert MJ, Drvaric DM: Little League shoulder: Case report. Orthopedics 1990;13:779-781.

Question 2094

Topic: 9. Shoulder and Elbow

A 74-year-old woman presents with severe shoulder pain and an inability to actively elevate her right arm above 45 degrees. Passive forward flexion is 160 degrees. Radiographs demonstrate superior migration of the humeral head with articulation against the acromion, forming an "acetabularized" coracoacromial arch, and severe glenohumeral osteoarthritis (Hamada Grade 3). Which of the following is the most appropriate surgical treatment?

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

Correct Answer & Explanation

. Reverse total shoulder arthroplasty


Explanation

Reverse total shoulder arthroplasty is the gold standard for rotator cuff tear arthropathy with pseudoparalysis. Anatomic total shoulder arthroplasty is contraindicated due to the deficient rotator cuff, which would lead to superior escape and early glenoid loosening.

Question 2095

Topic: 9. Shoulder and Elbow

A 24-year-old minor league baseball pitcher presents with posterior shoulder pain during the late-cocking phase of throwing. Examination reveals a 25-degree loss of internal rotation compared to the contralateral side, with intact overall arc of motion. What is the most appropriate initial management?

. Sleeper stretch program focusing on the posterior capsule
. Arthroscopic superior labral repair
. Arthroscopic posterior capsular release
. Biceps tenodesis
. Subacromial decompression

Correct Answer & Explanation

. Sleeper stretch program focusing on the posterior capsule


Explanation

This presentation is consistent with Glenohumeral Internal Rotation Deficit (GIRD), commonly seen in throwers due to posterior capsular contracture. The first-line treatment is a targeted stretching program (sleeper stretches) to restore internal rotation.

Question 2096

Topic: 9. Shoulder and Elbow

An 80-year-old woman with a massive, irreparable rotator cuff tear presents with disabling pain and "anterosuperior escape" of the humeral head upon attempted active forward elevation. The loss of which structure is the primary anatomical prerequisite for anterosuperior escape to occur?

. Coracoacromial ligament
. Coracohumeral ligament
. Superior glenohumeral ligament
. Middle glenohumeral ligament
. Transverse humeral ligament

Correct Answer & Explanation

. Coracoacromial ligament


Explanation

Anterosuperior escape occurs when the restraining mechanism of the coracoacromial (CA) arch is lost, typically due to prior acromioplasty or CA ligament resection in the presence of a massive, irreparable cuff tear. The CA ligament is critical for preventing superior translation in cuff-deficient shoulders.

Question 2097

Topic: 9. Shoulder and Elbow

A 52-year-old man presents with chronic shoulder pain and pseudoparalysis of elevation. MRI shows a massive, retracted, and fatty-infiltrated supraspinatus and infraspinatus tear, but an intact subscapularis and normal articular cartilage. Which of the following is the most appropriate joint-preserving surgical option?

. Arthroscopic partial cuff repair
. Latissimus dorsi transfer
. Superior capsular reconstruction (SCR)
. Reverse total shoulder arthroplasty (RTSA)
. Pectoralis major transfer

Correct Answer & Explanation

. Arthroscopic partial cuff repair


Explanation

Superior capsular reconstruction (SCR) is indicated for younger patients with massive, irreparable posterosuperior cuff tears and an intact subscapularis who lack advanced glenohumeral arthritis. RTSA is typically reserved for older patients or those with arthropathy.

Question 2098

Topic: 9. Shoulder and Elbow



A 72-year-old female presents with severe right shoulder pain, active forward elevation to 40 degrees, and hornblower's sign. Radiographs show superior migration of the humeral head and bone-on-bone glenohumeral arthritis. What is the most appropriate surgical treatment?

. Hemiarthroplasty
. Anatomic total shoulder arthroplasty
. Latissimus dorsi transfer
. Reverse total shoulder arthroplasty
. Superior capsular reconstruction

Correct Answer & Explanation

. Hemiarthroplasty


Explanation

Reverse total shoulder arthroplasty is the gold standard for rotator cuff tear arthropathy with pseudoparalysis. It medializes and distalizes the center of rotation, optimizing the deltoid's moment arm to allow active elevation.

Question 2099

Topic: 9. Shoulder and Elbow

A 25-year-old athlete suffered a traumatic shoulder dislocation. MRI reveals a 'J-sign' on the axial and coronal fluid-sensitive sequences. This finding is pathognomonic for which of the following lesions?

. Humeral avulsion of the glenohumeral ligament (HAGL)
. Anterior labroligamentous periosteal sleeve avulsion (ALPSA)
. Superior labrum anterior and posterior (SLAP) tear
. Glenolabral articular disruption (GLAD)
. Perthes lesion

Correct Answer & Explanation

. Humeral avulsion of the glenohumeral ligament (HAGL)


Explanation

A HAGL lesion represents an avulsion of the inferior glenohumeral ligament from its humeral attachment. On an MRI arthrogram, extravasation of contrast into the axillary pouch creates the classic 'J-sign'.

Question 2100

Topic: 9. Shoulder and Elbow

A 72-year-old female presents with chronic shoulder pain, an inability to actively elevate her arm past 45 degrees (pseudoparalysis), and an intact subscapularis. Radiographs show a preserved joint space without glenohumeral arthritis. What is the most reliable surgical option?

. Arthroscopic superior capsular reconstruction
. Latissimus dorsi tendon transfer
. Arthroscopic debridement and subacromial decompression
. Reverse total shoulder arthroplasty
. Anatomic total shoulder arthroplasty

Correct Answer & Explanation

. Arthroscopic superior capsular reconstruction


Explanation

In elderly patients with massive, irreparable posterosuperior rotator cuff tears and pseudoparalysis, reverse total shoulder arthroplasty provides the most reliable restoration of active elevation, even in the absence of advanced arthritis.