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Question 3701

Topic: 8. Foot and Ankle

A 55-year-old male presents with dorsal foot pain localized to the first metatarsophalangeal (MTP) joint. Examination reveals a dorsal osteophyte and pain primarily at the end-ranges of dorsiflexion, with preserved mid-range motion (Coughlin Stage 2 Hallux Rigidus). Non-operative measures have failed. What is the most appropriate surgical treatment?

. First MTP arthrodesis
. Cheilectomy
. Keller resection arthroplasty
. First MTP total joint replacement
. First tarsometatarsal arthrodesis (Lapidus)

Correct Answer & Explanation

. Cheilectomy


Explanation

Cheilectomy (removal of the dorsal osteophyte and up to 30% of the dorsal metatarsal head) is the procedure of choice for Stage 1 and 2 hallux rigidus with pain primarily on terminal dorsiflexion. First MTP fusion is preferred for end-stage (Stage 3 and 4) disease.

Question 3702

Topic: 8. Foot and Ankle

A 58-year-old patient with long-standing, poorly controlled diabetes presents with an acutely swollen, erythematous, and warm unilateral foot. Radiographs demonstrate periarticular fragmentation and debris at the tarsometatarsal joints. Elevation of the limb for 10 minutes leads to resolution of the erythema. What is the best initial management?

. Intravenous antibiotics and emergent surgical debridement
. Total contact casting
. Open reduction and internal fixation of the midfoot
. Below-knee amputation
. Corticosteroid injection into the affected joints

Correct Answer & Explanation

. Total contact casting


Explanation

The clinical picture describes acute Eichenholtz Stage I Charcot neuroarthropathy. The resolution of redness with elevation helps differentiate it from infection. The standard of care for acute Charcot is offloading with a total contact cast.

Question 3703

Topic: 8. Foot and Ankle

A 14-year-old boy is evaluated for recurrent ankle sprains and a rigid, painful flatfoot. On physical exam, subtalar motion is severely restricted. Which radiographic view is most sensitive for diagnosing the most likely pathology?

. Weight-bearing AP of the foot
. Lateral weight-bearing view of the foot
. Harris axial view of the heel
. 45-degree internal oblique view of the foot
. Anterior-posterior (AP) view of the ankle

Correct Answer & Explanation

. 45-degree internal oblique view of the foot


Explanation

The patient likely has a tarsal coalition. A calcaneonavicular coalition (most common) is best visualized on a 45-degree internal oblique view, whereas a talocalcaneal coalition is best seen on a Harris axial view or CT.

Question 3704

Topic: Midfoot & Hindfoot
A 50-year-old overweight female presents with progressive flattening of her left medial longitudinal arch. Examination reveals an inability to perform a single-leg heel raise and forefoot abduction with >30% talonavicular uncoverage on radiographs, but the hindfoot remains manually correctable. What is the appropriate surgical classification and treatment?
. Stage I PTTD; synovectomy and orthotics
. Stage IIA PTTD; FDL transfer and medializing calcaneal osteotomy
. Stage IIB PTTD; FDL transfer, medializing calcaneal osteotomy, and lateral column lengthening
. Stage III PTTD; Triple arthrodesis
. Stage IV PTTD; Tibiotalocalcaneal arthrodesis

Correct Answer & Explanation

. Stage IIB PTTD; FDL transfer, medializing calcaneal osteotomy, and lateral column lengthening


Explanation

Stage IIB adult acquired flatfoot deformity (flexible, but with severe forefoot abduction / >30% TN uncoverage) typically requires a lateral column lengthening (e.g., Evans osteotomy) in addition to FDL transfer and medial displacement calcaneal osteotomy.

Question 3705

Topic: 8. Foot and Ankle

When comparing outcomes of Total Ankle Arthroplasty (TAA) versus ankle arthrodesis for end-stage ankle osteoarthritis, TAA has been shown in long-term studies to have which of the following relative advantages?

. Lower rate of required reoperations overall
. Lower incidence of progressive adjacent joint (subtalar) arthritis
. Superior improvement in sports performance
. Zero risk of deep infection
. Higher rate of successful bone union

Correct Answer & Explanation

. Lower incidence of progressive adjacent joint (subtalar) arthritis


Explanation

TAA preserves some sagittal plane motion, which has been shown to reduce abnormal stresses on adjacent joints, thereby decreasing the incidence or progression of subtalar and transverse tarsal arthritis compared to ankle arthrodesis.

Question 3706

Topic: 8. Foot and Ankle

A 24-year-old snowboarder lands hard following a jump, sustaining a forceful dorsiflexion and inversion injury to the ankle. He has lateral ankle pain mimicking a severe sprain, but radiographs reveal a fracture. Which of the following fractures is pathognomonic for this mechanism?

. Anterior process of the calcaneus
. Lateral process of the talus
. Posterior process of the talus
. Base of the fifth metatarsal
. Sustentaculum tali

Correct Answer & Explanation

. Lateral process of the talus


Explanation

A 'snowboarder’s fracture' is a fracture of the lateral process of the talus. It is caused by severe dorsiflexion and inversion and is often misdiagnosed clinically as an anterior talofibular ligament sprain.

Question 3707

Topic: Ankle Trauma & Sports
A 13-year-old boy presents with ankle pain after an external rotation injury. Radiographs show a Salter-Harris III fracture of the anterolateral distal tibia. Which ligament's avulsion force is responsible for this specific fracture pattern?
. Anterior inferior tibiofibular ligament (AITFL)
. Posterior inferior tibiofibular ligament (PITFL)
. Anterior talofibular ligament (ATFL)
. Calcaneofibular ligament (CFL)
. Deltoid ligament

Correct Answer & Explanation

. Anterior inferior tibiofibular ligament (AITFL)


Explanation

This describes a juvenile Tillaux fracture, caused by the pull of the anterior inferior tibiofibular ligament (AITFL) on the anterolateral epiphysis, which is the last portion of the distal tibial physis to close.

Question 3708

Topic: Midfoot & Hindfoot

A 45-year-old runner with recalcitrant plantar fasciitis undergoes a complete surgical release of the plantar fascia. Post-operatively, she complains of new-onset, severe lateral midfoot pain and a visibly flatter arch. This complication is most directly related to which of the following pathomechanical changes?

. Medial column overload
. Lateral column overload and cuboid syndrome
. Avascular necrosis of the navicular
. Rupture of the tibialis anterior tendon
. Entrapment of the medial plantar nerve

Correct Answer & Explanation

. Lateral column overload and cuboid syndrome


Explanation

Complete release of the plantar fascia destroys the 'windlass mechanism' supporting the arch. This leads to arch collapse and subsequent lateral column overload, which often presents as severe lateral midfoot or cuboid pain.

Question 3709

Topic: 8. Foot and Ankle
A 28-year-old man sustains a Hawkins type III talar neck fracture following a motor vehicle accident. He undergoes urgent closed reduction and subsequent definitive open reduction and internal fixation. Which of the following best describes his risk of developing avascular necrosis (AVN) of the talar body?
. 0-10%
. 15-25%
. 30-50%
. 75-90%
. 100%

Correct Answer & Explanation

. 75-90%


Explanation

Hawkins type III fractures involve dislocation of the subtalar and tibiotalar joints, disrupting the major blood supply to the talus. The risk of AVN is reported to be between 75% and 90%.

Question 3710

Topic: Midfoot & Hindfoot

A 35-year-old male sustains a purely ligamentous Lisfranc injury. Current evidence suggests that when compared to open reduction and internal fixation (ORIF), primary arthrodesis of the first, second, and third tarsometatarsal joints for this specific injury pattern results in:

. Decreased rate of hardware removal and higher functional scores
. Increased rate of hardware removal
. Lower union rates
. Increased risk of deep infection
. Similar outcomes with higher reoperation rates

Correct Answer & Explanation

. Decreased rate of hardware removal and higher functional scores


Explanation

For purely ligamentous Lisfranc injuries, primary arthrodesis has been shown to yield better functional outcomes and a lower rate of planned hardware removal and secondary procedures compared to ORIF.

Question 3711

Topic: Forefoot

A 45-year-old woman complains of painful bunions. Weight-bearing radiographs reveal a hallux valgus angle (HVA) of 38 degrees and an intermetatarsal angle (IMA) of 16 degrees. There is no hypermobility of the first tarsometatarsal joint. What is the most appropriate surgical management?

. Distal soft tissue realignment alone
. Distal chevron osteotomy
. Proximal metatarsal osteotomy with distal soft tissue procedure
. Lapidus procedure (TMT arthrodesis)
. Keller resection arthroplasty

Correct Answer & Explanation

. Proximal metatarsal osteotomy with distal soft tissue procedure


Explanation

For severe hallux valgus (IMA >13 degrees, HVA >30 degrees), a proximal metatarsal osteotomy combined with a distal soft tissue procedure is indicated to achieve adequate correction. Lapidus is typically reserved for those with TMT hypermobility or first ray arthritis.

Question 3712

Topic: 8. Foot and Ankle

A 55-year-old male presents with dorsal midfoot and first toe pain. Examination reveals a palpable dorsal osteophyte and restricted, painful dorsiflexion of the first metatarsophalangeal (MTP) joint. Radiographs show moderate joint space narrowing with large dorsal osteophytes, but the plantar joint space is preserved. He has failed nonoperative management. What is the most appropriate surgical treatment?

. First MTP arthrodesis
. First MTP arthroplasty
. Cheilectomy
. Keller procedure
. Metatarsal head resurfacing

Correct Answer & Explanation

. Cheilectomy


Explanation

Cheilectomy is indicated for Grade 1 and 2 hallux rigidus with preserved plantar cartilage and pain predominantly on dorsiflexion. It involves removal of the dorsal osteophytes and the dorsal third of the metatarsal head.

Question 3713

Topic: Midfoot & Hindfoot

A 50-year-old woman presents with medial ankle pain and a progressively flattening arch. She is able to perform a single-leg heel rise but it is weak and painful. She has a flexible flatfoot deformity. Nonoperative management with a custom orthosis has failed. What is the most appropriate surgical intervention?

. Gastrocnemius recession alone
. Flexor digitorum longus (FDL) transfer to the navicular and a medializing calcaneal osteotomy
. Subtalar arthrodesis
. Triple arthrodesis
. Tibiotalocalcaneal arthrodesis

Correct Answer & Explanation

. Flexor digitorum longus (FDL) transfer to the navicular and a medializing calcaneal osteotomy


Explanation

The patient has Stage II posterior tibial tendon dysfunction characterized by a flexible deformity and weak single-leg heel rise. Standard surgical treatment includes an FDL transfer combined with a medializing calcaneal osteotomy.

Question 3714

Topic: 8. Foot and Ankle

A 58-year-old diabetic patient presents with a swollen, erythematous, and warm right foot without open ulcerations. Laboratory studies show normal white blood cell count and slightly elevated ESR. Radiographs demonstrate fragmentation and subluxation of the midfoot. What is the most appropriate initial management?

. Intravenous antibiotics and surgical debridement
. Immediate open reduction and internal fixation of the midfoot
. Total contact casting and non-weight-bearing
. Midfoot arthrodesis
. MRI of the foot to rule out osteomyelitis

Correct Answer & Explanation

. Total contact casting and non-weight-bearing


Explanation

The patient presents with acute Charcot arthropathy (Eichenholtz stage 1). The mainstay of initial treatment is offloading with a total contact cast to prevent further deformity and allow the inflammatory phase to resolve.

Question 3715

Topic: 8. Foot and Ankle

In the Sanders classification for intra-articular calcaneus fractures, the severity and type are determined primarily by which of the following radiographic or advanced imaging views?

. Lateral foot radiograph
. Harris axial view
. Anterior-posterior foot radiograph
. Coronal CT image through the widest portion of the posterior facet
. Sagittal CT image through the subtalar joint

Correct Answer & Explanation

. Coronal CT image through the widest portion of the posterior facet


Explanation

The Sanders classification is based on the number and location of articular fracture lines through the posterior facet of the calcaneus, as seen on coronal CT images.

Question 3716

Topic: 8. Foot and Ankle

Which of the following is true regarding functional bracing (early functional rehabilitation) compared to surgical repair for acute Achilles tendon ruptures?

. Functional bracing has a significantly higher re-rupture rate
. Surgical repair results in significantly higher functional scores at 1 year
. Functional bracing has a lower risk of soft-tissue complications and similar re-rupture rates
. Surgical repair has a lower risk of sural nerve injury
. Functional bracing requires a longer period of strict immobilization

Correct Answer & Explanation

. Functional bracing has a lower risk of soft-tissue complications and similar re-rupture rates


Explanation

Recent studies demonstrate that when utilizing an early functional rehabilitation protocol, nonoperative management of acute Achilles tendon ruptures yields similar re-rupture rates to surgical repair while avoiding surgical site complications.

Question 3717

Topic: 8. Foot and Ankle

A 42-year-old female presents with severe pain in the forefoot, often described as feeling like she is walking on a pebble. The pain is worst in narrow shoes and relieves when barefoot. Examination reveals a palpable click when the metatarsal heads are squeezed together while applying plantar pressure to the webspace. Which webspace is most commonly affected?

. First
. Second
. Third
. Fourth
. Fifth

Correct Answer & Explanation

. Third


Explanation

Morton's neuroma most commonly affects the third webspace, followed by the second. The clinical finding described is a positive Mulder's click.

Question 3718

Topic: 8. Foot and Ankle

A 62-year-old woman with end-stage post-traumatic ankle osteoarthritis is considering total ankle arthroplasty (TAA). Which of the following is considered an absolute contraindication to TAA?

. Age greater than 60 years
. Body Mass Index of 28
. Active deep infection of the ankle joint
. Contralateral subtalar arthritis
. Previous lateral ligament reconstruction

Correct Answer & Explanation

. Active deep infection of the ankle joint


Explanation

Active or recent deep infection is an absolute contraindication to total ankle arthroplasty. Relative contraindications include heavy labor, severe uncorrectable deformity, and significant avascular necrosis of the talus.

Question 3719

Topic: 8. Foot and Ankle

A 48-year-old male runner complains of heel pain that is worst with the first few steps in the morning. Examination reveals point tenderness at the medial tuberosity of the calcaneus. Initial management has included rest, NSAIDs, and a prefabricated shoe insert, with minimal improvement after 4 weeks. What is the most appropriate next step in management?

. Plantar fascia release surgery
. Corticosteroid injection
. Extracorporeal shock wave therapy
. Achilles and plantar fascia stretching program
. MRI of the foot

Correct Answer & Explanation

. Achilles and plantar fascia stretching program


Explanation

A structured stretching program targeting the plantar fascia and Achilles tendon has been shown to be highly effective. It is the appropriate next step in conservative management of plantar fasciitis before more invasive options are considered.

Question 3720

Topic: 8. Foot and Ankle

Tarsal tunnel syndrome involves entrapment of the tibial nerve or its branches. The boundaries of the tarsal tunnel include the medial malleolus anteriorly, the calcaneus laterally, and which structure superficially?

. Superior extensor retinaculum
. Flexor retinaculum (laciniate ligament)
. Plantar aponeurosis
. Spring ligament
. Deltoid ligament

Correct Answer & Explanation

. Flexor retinaculum (laciniate ligament)


Explanation

The superficial boundary (roof) of the tarsal tunnel is the flexor retinaculum. Entrapment of the posterior tibial nerve underneath this structure leads to tarsal tunnel syndrome.