8. Foot and Ankle MCQs

Most acute Achilles tendon ruptures occur in a relatively hypovascular 'watershed' area. Where is this region typically located relative to the calcaneal insertion?

A 55-year-old diabetic patient with peripheral neuropathy presents with a red, hot, swollen foot without open ulcers. Radiographs reveal fragmentation of the tarsometatarsal joints, periarticular debris, and subluxation. There is no systemic fever or leukocytosis. According to the Eichenholtz classification of Charcot arthropathy, which stage does this represent?

Which of the following is the primary advantage of primary arthrodesis compared to open reduction and internal fixation (ORIF) for the treatment of a purely ligamentous Lisfranc injury?

When performing an extensile lateral approach for the open reduction and internal fixation of a displaced intra-articular calcaneus fracture, the viability of the lateral soft tissue flap is primarily dependent on which of the following arteries?

During flatfoot reconstruction for Stage IIb posterior tibial tendon dysfunction (PTTD), a surgeon performs a flexor digitorum longus (FDL) transfer to the navicular, a medializing calcaneal osteotomy, and a lateral column lengthening (Evans osteotomy). Which of the following complications is most uniquely and commonly associated with the lateral column lengthening procedure?

The Achilles tendon is most susceptible to spontaneous rupture in its relative hypovascular 'watershed' zone. Where is this critical zone anatomically located?

A 22-year-old collegiate football player sustains a purely ligamentous Lisfranc injury. Weight-bearing radiographs demonstrate 3 mm of diastasis between the medial and middle cuneiforms with no associated fractures. Based on Level 1 evidence (e.g., Ly and Coetzee), what is the most appropriate surgical management?

A 55-year-old male with hallux rigidus complains of severe pain throughout the entire range of motion of the first metatarsophalangeal (MTP) joint, including pain in the mid-range. Radiographs show severe joint space narrowing, large dorsal osteophytes, and subchondral cysts. Based on the Coughlin and Shurnas classification, which grade does this represent and what is the definitive surgical option?

In a patient presenting with Stage II acquired adult flatfoot deformity (posterior tibial tendon dysfunction), physical examination and MRI often reveal attenuation of a key static stabilizing ligament that supports the talonavicular joint. Which of the following ligaments is most commonly affected in this scenario?

When initiating early functional rehabilitation for a patient undergoing non-operative management of an acute Achilles tendon rupture, what is the optimal initial ankle position in the functional brace to maximize tendon healing and prevent gapping?

The Lisfranc ligament is crucial for the stability of the midfoot and is frequently involved in high-energy foot trauma. Anatomically, this ligament originates from the medial cuneiform and inserts onto which structure?

A surgeon utilizes the classic extensile lateral approach for the open reduction and internal fixation (ORIF) of a displaced intra-articular calcaneus fracture. During the elevation of the full-thickness subperiosteal flap, which nerve is at greatest risk of iatrogenic injury if the flap is not raised correctly?

A 50-year-old woman presents with severe, symptomatic hallux valgus. Weight-bearing radiographs reveal a Hallux Valgus Angle (HVA) of 45 degrees, an Intermetatarsal Angle (IMA) of 20 degrees, and clinical examination demonstrates gross hypermobility of the first tarsometatarsal (TMT) joint. Which surgical procedure is most indicated to correct the deformity and minimize the risk of recurrence?

A 14-year-old boy with Charcot-Marie-Tooth disease presents with a symptomatic, flexible cavovarus foot deformity. To correct the primary muscle imbalance and augment ankle dorsiflexion, which tendon transfer is most commonly performed?

A 22-year-old collegiate football player suffers a high ankle sprain following an external rotation force to the dorsiflexed foot. In a purely ligamentous syndesmotic injury, biomechanical and clinical studies show which of the following ligaments is typically the first to rupture?

A 55-year-old active male undergoes surgical treatment for refractory insertional Achilles tendinopathy with a large calcaneal exostosis. During debridement, approximately 60% of the Achilles tendon insertion is detached to adequately resect the pathologic bone and degenerative tendon. What is the most appropriate intraoperative management?