This practice set contains high-yield board review questions covering key concepts in 8. Foot and Ankle. Each clinical scenario is designed to test your diagnostic and management skills relevant to this subspecialty.
Question 3721
Topic: 8. Foot and Ankle
A 22-year-old female ballet dancer presents with posteromedial ankle pain, exacerbated by going en pointe. She notes a triggering sensation in her great toe. Which of the following is the most likely diagnosis?
Correct Answer & Explanation
. Flexor hallucis longus (FHL) tenosynovitis
Explanation
FHL tenosynovitis is common in ballet dancers due to repetitive plantar flexion (en pointe). It often presents with posteromedial ankle pain and triggering or crepitus along the FHL sheath posterior to the medial malleolus.
Question 3722
Topic: 8. Foot and Ankle
A 68-year-old male presents with an acute Achilles tendon rupture sustained while playing tennis. He has a past medical history of hypertension and well-controlled diabetes. He is moderately active but prefers avoiding surgery. Which of the following is the most appropriate management, considering current evidence regarding nonoperative versus operative treatment in this demographic?
Correct Answer & Explanation
. Functional rehabilitation protocol with early weight-bearing in a protective boot
Explanation
Recent randomized controlled trials demonstrate that functional rehabilitation protocols for Achilles tendon ruptures yield similar functional outcomes and re-rupture rates compared to surgical repair, while avoiding surgical site complications.
Question 3723
Topic: 8. Foot and Ankle
A 55-year-old construction worker presents with end-stage post-traumatic ankle osteoarthritis. He has failed standard NSAID therapy and intra-articular corticosteroid injections. He wishes to delay surgery. Which of the following orthotic modifications is most effective for alleviating his pain during ambulation?
Correct Answer & Explanation
. Rigid ankle-foot orthosis (AFO) with a rocker-bottom shoe
Explanation
A rigid AFO limits painful tibiotalar motion, while a rocker-bottom sole compensates for the lost ankle dorsiflexion and plantarflexion during the gait cycle, reducing forces across the arthritic joint.
Question 3724
Topic: 8. Foot and Ankle
A 24-year-old athlete sustains a purely ligamentous Lisfranc injury involving the first, second, and third tarsometatarsal joints with 3 mm of diastasis, as seen on weight-bearing radiographs.
Based on current literature, which of the following surgical interventions provides the best long-term functional outcome?
Correct Answer & Explanation
. Primary arthrodesis of the first, second, and third tarsometatarsal joints
Explanation
Multiple studies have shown that primary arthrodesis of the medial three rays for purely ligamentous Lisfranc injuries results in superior functional outcomes and lower hardware removal rates compared to ORIF.
Question 3725
Topic: Midfoot & Hindfoot
A 30-year-old male is involved in a motor vehicle collision and sustains a Hawkins type III fracture of the talar neck. Which of the following best describes the joint dislocations associated with this specific injury pattern?
Correct Answer & Explanation
. Subtalar and tibiotalar joints
Explanation
A Hawkins type III talar neck fracture involves displacement with dislocation of both the subtalar and tibiotalar joints. This injury carries a very high risk (approaching 100% in some series) of avascular necrosis of the talar body.
Question 3726
Topic: Forefoot
A 60-year-old woman complains of severe pain and stiffness in her great toe that limits her walking. Examination reveals less than 10 degrees of dorsiflexion at the first metatarsophalangeal (MTP) joint and mid-arc pain. Radiographs demonstrate severe joint space narrowing, a large dorsal osteophyte, and subchondral sclerosis. What is the gold standard operative treatment?
Correct Answer & Explanation
. First MTP joint arthrodesis
Explanation
First MTP joint arthrodesis is the gold standard for severe, high-grade hallux rigidus (Coughlin and Shurnas Grade 3 or 4). Cheilectomy is indicated for early-stage disease with preserved joint space and pain primarily at terminal dorsiflexion.
Question 3727
Topic: 8. Foot and Ankle
A 54-year-old woman presents with progressive flattening of her left foot and medial ankle pain. Examination shows a flexible flatfoot, inability to perform a single-limb heel rise, and excessive forefoot abduction. Radiographs show greater than 40% talonavicular uncoverage. What surgical reconstruction is most appropriate?
Correct Answer & Explanation
. FDL transfer, MDCO, and lateral column lengthening
Explanation
This patient has Stage IIb adult-acquired flatfoot deformity (flexible, with significant forefoot abduction). Treatment requires soft tissue reconstruction (FDL transfer) and bony realignment, typically achieved with a medial displacement calcaneal osteotomy and a lateral column lengthening.
Question 3728
Topic: Midfoot & Hindfoot
A 61-year-old male with poorly controlled type 2 diabetes presents with a globally swollen, erythematous, and warm right foot. He denies trauma. Pulses are palpable, and sensation to a 5.07 Semmes-Weinstein monofilament is absent. Radiographs show periarticular debris and early fragmentation at the tarsometatarsal joints. His ESR and CRP are normal. What is the most appropriate initial management?
Correct Answer & Explanation
. Total contact casting and strict non-weight-bearing
Explanation
The patient presents with an acute phase (Eichenholtz stage I) Charcot arthropathy. In the absence of an open ulcer or elevated inflammatory markers suggesting infection, the standard of care is immediate immobilization with a total contact cast and strict non-weight-bearing.
Question 3729
Topic: 8. Foot and Ankle
A 35-year-old construction worker falls from a ladder and sustains a severely displaced, intra-articular calcaneus fracture. He is scheduled for open reduction and internal fixation utilizing a standard extensile lateral approach. During the horizontal limb of the incision, which of the following structures is at greatest risk of iatrogenic injury?
Correct Answer & Explanation
. Sural nerve
Explanation
The sural nerve courses posterior to the lateral malleolus and along the lateral aspect of the hindfoot. It is highly vulnerable to injury during the horizontal limb of the extensile lateral approach to the calcaneus, which can lead to painful neuromas.
Question 3730
Topic: 8. Foot and Ankle
A 24-year-old collegiate football player hyperplantarflexes his foot with an axial load during a tackle. Weight-bearing radiographs reveal a 'fleck sign' and 3 mm of widening between the medial and middle cuneiforms. What is the primary ligamentous restraint that has been disrupted?
Correct Answer & Explanation
. Lateral aspect of the medial cuneiform to the medial base of the second metatarsal
Explanation
The Lisfranc ligament is an interosseous ligament that connects the lateral aspect of the medial cuneiform to the medial aspect of the base of the second metatarsal. It is the strongest and primary stabilizer of the second tarsometatarsal joint complex.
Question 3731
Topic: 8. Foot and Ankle
A 65-year-old woman with post-traumatic end-stage ankle osteoarthritis is being evaluated for a total ankle replacement (TAR). Which of the following conditions is considered an absolute contraindication for this procedure?
Correct Answer & Explanation
. Avascular necrosis involving more than 50% of the talar body
Explanation
Avascular necrosis involving more than 50% of the talus is an absolute contraindication to total ankle arthroplasty due to the high risk of component subsidence and failure. In such cases, tibiotalocalcaneal (TTC) arthrodesis is preferred.
Question 3732
Topic: 8. Foot and Ankle
A 40-year-old male sustains an acute, closed Achilles tendon rupture while playing tennis. He is discussing operative repair versus non-operative management with early functional rehabilitation. Based on recent literature, what is the most accurate statement regarding outcomes?
Correct Answer & Explanation
. Early functional rehabilitation has equivalent re-rupture rates to surgery but fewer wound complications.
Explanation
Recent high-quality studies show that non-operative management utilizing early functional rehabilitation protocols yields re-rupture rates equivalent to operative management, while avoiding the surgical risks of infection and wound breakdown.
Question 3733
Topic: Midfoot & Hindfoot
A 55-year-old female presents with progressive medial ankle pain and an acquired flatfoot deformity. Examination reveals a flexible hindfoot valgus, inability to perform a single-leg heel rise, and significant forefoot abduction (Stage IIb posterior tibial tendon dysfunction). Which combination of procedures is most appropriate?
Stage IIb PTTD is characterized by a flexible deformity with greater than 30-40% uncoverage of the talonavicular joint (forefoot abduction). It is optimally treated with an FDL transfer, medial displacement calcaneal osteotomy, and a lateral column lengthening (e.g., Evans osteotomy) to correct the forefoot abduction.
Question 3734
Topic: Forefoot
A 45-year-old woman presents with a symptomatic hallux valgus deformity. Radiographs demonstrate a hallux valgus angle (HVA) of 38 degrees, an intermetatarsal angle (IMA) of 18 degrees, and hypermobility at the first tarsometatarsal (TMT) joint. What is the most appropriate surgical treatment?
Correct Answer & Explanation
. First TMT arthrodesis (Lapidus procedure) with distal soft tissue realignment
Explanation
A first TMT arthrodesis (Lapidus) is indicated for severe hallux valgus (IMA > 15-20 degrees) and is especially preferred when there is clinical or radiographic hypermobility of the first ray to prevent recurrence.
Question 3735
Topic: 8. Foot and Ankle
A 50-year-old man presents with dorsal pain in his great toe, especially during terminal stance phase. Examination reveals pain at the extremes of dorsiflexion, but no pain during mid-range motion. Radiographs reveal dorsal osteophytes at the first MTP joint with mild to moderate joint space narrowing (Coughlin and Shurnas Grade 2). What is the recommended primary surgical intervention after failed conservative care?
Correct Answer & Explanation
. Cheilectomy
Explanation
Grade 2 hallux rigidus is characterized by dorsal osteophytes and pain primarily at the extremes of motion with preservation of the main articular space. Cheilectomy (removal of dorsal osteophytes and the dorsal third of the metatarsal head) provides excellent pain relief and preserves motion.
Question 3736
Topic: 8. Foot and Ankle
A 58-year-old male with poorly controlled diabetes presents with a unilaterally erythematous, warm, and swollen foot. He denies any trauma. Radiographs reveal early fragmentation, periarticular debris, and subluxation of the tarsometatarsal joints. There are no open ulcers. What is the most appropriate initial management?
Correct Answer & Explanation
. Total contact casting and non-weight-bearing
Explanation
This presentation is consistent with acute Eichenholtz stage I Charcot neuroarthropathy. The gold standard for initial management is immediate offloading and immobilization using a total contact cast to arrest the progression of deformity while the acute inflammatory stage resolves.
Question 3737
Topic: 8. Foot and Ankle
A 20-year-old cross-country runner presents with an insidious onset of dorsal midfoot pain. Initial radiographs are unremarkable, but an MRI demonstrates a non-displaced fracture in the central third of the tarsal navicular. What is the most appropriate treatment?
Correct Answer & Explanation
. Non-weight-bearing short leg cast for 6 to 8 weeks
Explanation
Non-displaced tarsal navicular stress fractures have a high risk of nonunion due to a relatively avascular zone in the central third of the bone. Strict non-weight-bearing in a short leg cast for 6 to 8 weeks is the proven conservative treatment.
Question 3738
Topic: 8. Foot and Ankle
A 24-year-old athlete sustains an axial load injury to a plantarflexed foot. Non-weight-bearing radiographs of the foot are interpreted as normal, but the patient has severe midfoot pain and cannot bear weight. What is the next best step in evaluation?
Correct Answer & Explanation
. Weight-bearing radiographs of the foot
Explanation
Weight-bearing radiographs are the initial diagnostic modality of choice to evaluate for a subtle Lisfranc injury when non-weight-bearing views are normal. Widening of the interval between the first and second metatarsal bases greater than 2 mm is diagnostic of instability.
Question 3739
Topic: 8. Foot and Ankle
A 62-year-old woman complains of dorsal midfoot pain and limited toe-off during gait. Examination reveals severe pain with hallux dorsiflexion, which is limited to less than 10 degrees. Radiographs show diffuse joint space loss across the entire first metatarsophalangeal joint (Coughlin Stage 3) and prominent dorsal osteophytes. She has failed rigid shoe modifications. What is the best operative management?
Correct Answer & Explanation
. First metatarsophalangeal joint arthrodesis
Explanation
First MTP joint arthrodesis is the gold standard for advanced (Stage 3 and 4) hallux rigidus with diffuse joint space narrowing. Cheilectomy is indicated for Stage 1 or 2 disease where the plantar joint space is still preserved.
Question 3740
Topic: 8. Foot and Ankle
A 55-year-old woman presents with progressive flattening of her left foot and medial ankle pain. Examination reveals a flexible hindfoot valgus, an inability to perform a single-leg heel rise, and a positive 'too-many-toes' sign. Conservative management has failed. What is the most appropriate surgical intervention?
Correct Answer & Explanation
. FDL transfer combined with a medial displacement calcaneal osteotomy
Explanation
This patient has Stage II posterior tibial tendon dysfunction characterized by a flexible flatfoot deformity. Surgical management requires both a soft tissue reconstruction (FDL transfer) and a bony realignment procedure (medial displacement calcaneal osteotomy) to restore the arch and protect the transfer.
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