8. Foot and Ankle MCQs

A 28-year-old man sustains an isolated, closed medial subtalar dislocation while playing basketball. The head of the talus is palpable laterally. An attempt at closed reduction in the emergency department is unsuccessful. Which anatomic structure is most commonly interposed and blocking reduction in a medial subtalar dislocation?

During the surgical planning for a complex pilon fracture, the surgeon identifies an avulsed bone fragment from the anterolateral aspect of the distal tibia. This is classically known as the Chaput fragment. Which syndesmotic ligament is attached to this specific fragment?

A 35-year-old female sustains a purely ligamentous Lisfranc injury with complete disruption of the Lisfranc ligament complex and resultant dorsal displacement of the first and second metatarsals. Based on prospective randomized evidence, which treatment modality provides the best long-term functional outcomes and lowest reoperation rate for a purely ligamentous injury?

A 25-year-old female presents with midfoot pain after an axial load injury to a plantarflexed foot. Weight-bearing radiographs show 3 mm of widening between the first and second metatarsal bases. The primary ligament injured in this classic Lisfranc injury connects which two anatomical structures?

A 35-year-old male sustains a high-energy ankle injury. CT imaging reveals a distinct fracture fragment at the anterolateral aspect of the distal tibia, commonly referred to as the Tillaux-Chaput fragment. Which ligament attaches to this specific fragment?

A 22-year-old male undergoes surgical stabilization of a rotational ankle fracture. Intraoperative external rotation stress testing confirms syndesmotic instability. Of the ligaments comprising the syndesmotic complex, which one is anatomically the thickest and provides the greatest resistance to posterior-lateral translation of the fibula?

A 22-year-old football player sustains an axial load to a plantarflexed foot. Weight-bearing radiographs show a 3 mm diastasis between the bases of the first and second metatarsals. The disrupted primary stabilizing ligament connects which two structures?

A 33-year-old male sustains a lateral subtalar dislocation after a fall from scaffolding. Closed reduction in the emergency department is unsuccessful. Which anatomical structure is most commonly responsible for blocking the reduction in a lateral subtalar dislocation?

The Lisfranc ligament is an essential stabilizing structure of the midfoot. What are its exact anatomical attachments?

A 45-year-old male sustains an acute Achilles tendon rupture during a tennis match. The rupture typically occurs in the "watershed" region. What is the approximate distance of this relative avascular zone from the tendon's calcaneal insertion?

A 32-year-old recreational basketball player feels a "pop" in the back of his heel and is diagnosed with an acute Achilles tendon rupture. The typical "watershed" area where most Achilles tendon ruptures occur is located approximately how far proximal to its insertion on the calcaneus?

In a severe midfoot trauma, a patient sustains a Lisfranc injury. Anatomically, the Lisfranc ligament is an interosseous ligament that connects which two osseous structures?

A 24-year-old gymnast lands awkwardly and sustains an acute midfoot injury. Radiographs show a 'fleck sign' in the first intermetatarsal space. This indicates an avulsion of the Lisfranc ligament. What is the precise anatomical origin and insertion of the intact Lisfranc ligament?

During a percutaneous or minimally invasive repair of an acute Achilles tendon rupture, the sural nerve is at significant risk of iatrogenic entrapment. At approximately what distance proximal to the superior calcaneal tuberosity does the sural nerve typically cross the lateral border of the Achilles tendon?

A 55-year-old diabetic male presents with a swollen, erythematous, and warm foot. Radiographs reveal prominent periarticular fragmentation, subluxation of the tarsometatarsal joints, and bony debris. According to the Eichenholtz classification of Charcot arthropathy, what stage does this represent, and what is the hallmark radiographic finding of the subsequent stage?

A 24-year-old football player sustains a hyper-plantarflexion injury to his foot. Radiographs show a widened interval between the first and second metatarsal bases. The primary ligament injured in this condition connects which two anatomical structures?

A 60-year-old patient with long-standing poorly controlled diabetes presents with a unilaterally red, hot, swollen foot without an open ulcer. Radiographs reveal prominent periarticular fragmentation, debris, and subluxation of the midfoot joints. This represents Eichenholtz Stage I Charcot arthropathy. What is the most appropriate initial management?

The Lisfranc ligament is a critical stabilizing structure of the midfoot. Between which two osseous structures does the primary, strongest interosseous band of the Lisfranc ligament course?