8. Foot and Ankle MCQs

Which of the following ligamentous structures provides the greatest resistance to posterior translation and lateral displacement of the fibula relative to the tibia at the level of the syndesmosis?

When placing a trans-syndesmotic positioning screw for a syndesmosis rupture, what is the optimal trajectory of the screw to ensure accurate engagement of the tibia?

Intraoperatively, after open reduction and internal fixation of a lateral malleolus fracture, the surgeon performs an external rotation stress test to assess the syndesmosis. What radiographic finding on the mortise view definitively indicates a concomitant syndesmotic and deltoid ligament injury requiring fixation?

A patient sustains an isolated pronation-external rotation injury to the ankle. Imaging demonstrates widening of the syndesmosis. According to the Lauge-Hansen classification, which structure is typically the first to fail in this specific mechanism?

Following the placement of two trans-syndesmotic screws for a severe rotational ankle fracture, the surgeon obtains standard intraoperative fluoroscopy. Which of the following modalities has been shown to be the most sensitive and specific for detecting syndesmotic malreduction postoperatively?

A 25-year-old professional soccer player suffers a twisting injury to his ankle. Plain radiographs are obtained to evaluate for a syndesmotic injury. Which of the following radiographic parameters is the most reliable indicator of syndesmotic widening on standard AP or mortise views?

A 30-year-old male undergoes open reduction and internal fixation of a Weber C ankle fracture with an associated syndesmotic injury. The surgeon utilizes a suture-button construct. What is the primary biomechanical advantage of this construct compared to traditional syndesmotic screws?

During open reduction and internal fixation of a lateral malleolus fracture, the surgeon suspects a concomitant syndesmotic injury. Which of the following intraoperative maneuvers is most appropriate to evaluate the integrity of the syndesmosis?

A 55-year-old male with long-standing diabetes presents with a progressive foot deformity, now exhibiting a classic rocker bottom appearance as seen in the provided radiograph.

During surgical reconstruction of a severe rocker bottom Charcot foot, the surgeon identifies a significant equinus contracture. According to the case description, which of the following is the most critical initial soft tissue procedure to ensure successful deformity correction and prevent hardware failure?

A 50-year-old patient presents with Charcot neuroarthropathy primarily affecting the subtalar, talonavicular, and calcaneocuboid joints. According to the Brodsky classification system, what type of Charcot involvement does this patient exhibit?

A 55-year-old male with a long-standing history of diabetes mellitus presents with a red, hot, swollen right foot. He denies trauma, fever, or chills. He has palpable pedal pulses and a severe peripheral neuropathy. Radiographs show soft tissue swelling, periarticular debris, and early fragmentation at the tarsometatarsal joints. According to the Eichenholtz classification, what is the most appropriate initial management?

In the pathogenesis of Charcot neuroarthropathy, the neurovascular theory proposes that autonomic neuropathy directly leads to which of the following physiological changes?

According to the Brodsky classification of Charcot joints, which anatomical location represents a Type 1 deformity, being the most common site of involvement?

A 55-year-old diabetic male presents with an acutely swollen, red, and warm right foot. He denies trauma. Radiographs reveal periarticular debris, subluxation of the tarsometatarsal joints, and fracture fragmentation. What is the most appropriate initial management?

A 50-year-old patient with an acute Charcot midfoot flare presents with severe erythema and swelling. The clinician is trying to differentiate between an acute Charcot neuroarthropathy and a severe soft-tissue infection (cellulitis). Which simple clinical test is most useful in this acute setting?

A 55-year-old male with poorly controlled diabetes presents with a red, hot, swollen right foot. Radiographs show periarticular debris, fragmentation, and subluxation at the tarsometatarsal joints. According to the Eichenholtz classification, what stage does this represent and what is the primary initial treatment?

A 65-year-old male with a history of midfoot Charcot arthropathy (Eichenholtz Stage 3) presents with a recurrent plantar ulcer beneath a prominent cuboid. The foot is stable, and vascular supply is adequate. Non-operative management with a CROW boot has failed to heal the ulcer over the past 6 months. What is the most appropriate surgical intervention?