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Question 3641

Topic: 8. Foot and Ankle

During clinical evaluation of an acute ankle injury, the external rotation stress test produces severe pain anterior to the lateral malleolus. Which ligament is the primary restraint to anterior translation of the distal fibula and is typically the first to tear in a syndesmotic injury?

. Posterior inferior tibiofibular ligament (PITFL)
. Anterior inferior tibiofibular ligament (AITFL)
. Interosseous ligament
. Deltoid ligament
. Calcaneofibular ligament

Correct Answer & Explanation

. Anterior inferior tibiofibular ligament (AITFL)


Explanation

The anterior inferior tibiofibular ligament (AITFL) is the most anterior structure of the syndesmosis. It provides the primary restraint to external rotation and anterior translation of the fibula and is reliably the first ligament injured in a syndesmotic sprain.

Question 3642

Topic: 8. Foot and Ankle

A 48-year-old woman complains of chronic plantar foot pain, burning, and numbness that worsens with prolonged standing. Examination reveals a positive Tinel's sign posterior to the medial malleolus. Entrapment of which nerve is the primary cause of her symptoms?

. Sural nerve
. Deep peroneal nerve
. Superficial peroneal nerve
. Posterior tibial nerve
. Saphenous nerve

Correct Answer & Explanation

. Posterior tibial nerve


Explanation

Tarsal tunnel syndrome is a compressive neuropathy of the posterior tibial nerve or its branches as it travels deep to the flexor retinaculum posterior to the medial malleolus.

Question 3643

Topic: 8. Foot and Ankle

A 24-year-old professional ballet dancer presents with chronic posteromedial ankle pain, especially when en pointe. Examination reveals pseudo-hallux rigidus and triggering of the great toe during active motion. In this specific tendinopathy, where is the most common site of stenosing tenosynovitis?

. Under the sustentaculum tali
. At the knot of Henry
. Posterior to the medial malleolus within the tarsal tunnel proper
. Within the fibro-osseous tunnel between the medial and lateral tubercles of the posterior talus
. Distal to the medial and lateral sesamoids of the first MTP joint

Correct Answer & Explanation

. Within the fibro-osseous tunnel between the medial and lateral tubercles of the posterior talus


Explanation

Flexor hallucis longus (FHL) tenosynovitis, often called dancer's tendinitis, most frequently occurs at the fibro-osseous tunnel at the posterior aspect of the talus, bordered by the medial and lateral talar tubercles.

Question 3644

Topic: 8. Foot and Ankle

A 45-year-old female with chronic, severe plantar fasciitis has failed 6 months of conservative care, including dedicated Achilles and plantar fascia stretching, custom orthotics, and NSAIDs. She wishes to avoid surgery if possible. What is the most appropriate next step in her management?

. Endoscopic plantar fascia release
. Corticosteroid injection or extracorporeal shockwave therapy (ESWT)
. Application of a total contact cast for 8 weeks
. Open gastrocnemius recession
. Surgical excision of the calcaneal spur

Correct Answer & Explanation

. Corticosteroid injection or extracorporeal shockwave therapy (ESWT)


Explanation

For plantar fasciitis refractory to primary non-operative measures, second-line conservative treatments such as local corticosteroid injections or extracorporeal shockwave therapy (ESWT) are indicated before resorting to surgical intervention. Calcaneal spur excision is rarely indicated.

Question 3645

Topic: Forefoot

A 45-year-old female presents with a painful bunion. Radiographs reveal a hallux valgus angle of 35 degrees, an intermetatarsal angle of 14 degrees, and an abnormally increased distal metatarsal articular angle (DMAA) of 25 degrees. To appropriately correct the deformity while restoring joint congruency, which of the following procedures is required?

. First tarsometatarsal arthrodesis
. Proximal opening wedge osteotomy
. Distal medial closing wedge osteotomy
. Lateral soft tissue release alone
. Proximal phalanx osteotomy

Correct Answer & Explanation

. Distal medial closing wedge osteotomy


Explanation

A high DMAA indicates the articular surface is laterally deviated. A distal medial closing wedge osteotomy (such as a modified Chevron or Reverdin) is required to correct the articular orientation and achieve a congruent joint.

Question 3646

Topic: 8. Foot and Ankle

During surgical fixation of a displaced intra-articular calcaneus fracture via an extensile lateral approach, meticulous soft tissue handling is necessary. Which nerve is at greatest risk of iatrogenic injury during the dissection and retraction of the inferior limb of this incision?

. Superficial peroneal nerve
. Deep peroneal nerve
. Sural nerve
. Saphenous nerve
. Lateral plantar nerve

Correct Answer & Explanation

. Sural nerve


Explanation

The sural nerve courses posterior to the fibula and along the lateral aspect of the hindfoot. It is highly susceptible to injury or traction neuritis during the inferior horizontal limb of the extensile lateral approach to the calcaneus.

Question 3647

Topic: Midfoot & Hindfoot

A 55-year-old woman is diagnosed with acquired adult flatfoot deformity secondary to posterior tibial tendon dysfunction. Examination and weight-bearing radiographs reveal flexible hindfoot valgus and greater than 40% uncoverage of the talonavicular joint. What is the most appropriate surgical reconstruction?

. FDL transfer and isolated medial displacement calcaneal osteotomy
. Subtalar arthrodesis
. Triple arthrodesis
. FDL transfer and lateral column lengthening
. Spring ligament repair alone

Correct Answer & Explanation

. FDL transfer and lateral column lengthening


Explanation

This patient has Stage IIb flatfoot deformity characterized by significant forefoot abduction (talonavicular uncoverage > 40%). Lateral column lengthening combined with an FDL transfer is required to adequately correct the severe abduction deformity.

Question 3648

Topic: Midfoot & Hindfoot

A 22-year-old competitive rugby player sustains a purely ligamentous Lisfranc injury with dynamic instability demonstrated on weight-bearing radiographs. To minimize the risk of articular cartilage damage and hardware breakage while allowing early return to sport, what is the current recommended surgical treatment?

. Closed reduction and casting
. Temporary K-wire fixation
. Primary partial midfoot arthrodesis
. Open reduction and transarticular screw fixation
. Open reduction and dorsal spanning plate fixation

Correct Answer & Explanation

. Open reduction and dorsal spanning plate fixation


Explanation

Dorsal spanning plates have become the preferred treatment for purely ligamentous Lisfranc injuries. They provide rigid fixation without violating the articular cartilage, avoiding the joint damage associated with transarticular screws.

Question 3649

Topic: 8. Foot and Ankle

A 24-year-old patient with Charcot-Marie-Tooth disease presents with a bilateral cavovarus foot deformity. During physical examination, a Coleman block test is performed and the hindfoot varus corrects to neutral. What does this specific finding indicate?

. Rigid subtalar joint contracture
. Spasticity of the posterior tibial tendon
. The deformity is driven by a rigid, plantarflexed first ray
. Weakness of the peroneus longus
. Fixed contracture of the Achilles tendon

Correct Answer & Explanation

. The deformity is driven by a rigid, plantarflexed first ray


Explanation

The Coleman block test drops the first metatarsal off the block to eliminate its effect on the hindfoot. If the hindfoot varus corrects to neutral, it confirms a flexible hindfoot driven by a rigid plantarflexed first ray (forefoot-driven varus).

Question 3650

Topic: 8. Foot and Ankle

A 28-year-old skier presents with chronic posterolateral ankle pain and a popping sensation when circumducting the ankle against resistance. Examination reveals the peroneal tendons translating anterior to the lateral malleolus. Incompetence of which anatomical structure is primarily responsible for this pathology?

. Anterior talofibular ligament
. Calcaneofibular ligament
. Superior peroneal retinaculum
. Inferior peroneal retinaculum
. Peroneus brevis tendon

Correct Answer & Explanation

. Superior peroneal retinaculum


Explanation

Peroneal tendon subluxation is caused by injury, avulsion, or incompetence of the superior peroneal retinaculum. Surgical repair or reconstruction of this structure is typically required to restore stability.

Question 3651

Topic: 8. Foot and Ankle

A 70-year-old low-demand community ambulator reports feeling a "snap" over his anterior ankle while walking down stairs. He presents with a painless foot drop, a palpable step-off anterior to the ankle joint, and inability to actively dorsiflex the ankle. What is the most appropriate initial management?

. Ankle-foot orthosis (AFO)
. Primary end-to-end tendon repair
. Extensor hallucis longus transfer
. Tibiotalar arthrodesis
. Achilles tendon lengthening

Correct Answer & Explanation

. Ankle-foot orthosis (AFO)


Explanation

Atraumatic ruptures of the tibialis anterior tendon in elderly, low-demand patients are generally well-tolerated and best managed nonoperatively with an AFO. Operative management has higher complication rates and is reserved for younger, high-demand individuals.

Question 3652

Topic: 8. Foot and Ankle
A 50-year-old diabetic patient presents with a swollen, erythematous, and warm unilateral foot. There are no open ulcers or signs of systemic infection. Radiographs demonstrate marked periarticular debris, bone fragmentation, and early subluxation of the tarsometatarsal joints. What is the current Eichenholtz stage and the standard of care treatment?
. Stage 0; observation
. Stage I; total contact casting and non-weight-bearing
. Stage II; immediate midfoot arthrodesis
. Stage III; custom accommodative shoe wear
. Stage III; Achilles tendon lengthening

Correct Answer & Explanation

. Stage I; total contact casting and non-weight-bearing


Explanation

The clinical and radiographic presentation is classic for Eichenholtz Stage I (Development/Fragmentation) Charcot neuroarthropathy. The gold standard for initial management is strict immobilization using a total contact cast to arrest the inflammatory process and prevent severe structural collapse.

Question 3653

Topic: 8. Foot and Ankle

A 14-year-old boy presents with a history of recurrent ankle sprains and a rigid, painful flatfoot. Clinical exam reveals peroneal muscle spasm. A lateral radiograph demonstrates a tubular elongation of the anterior process of the calcaneus known as the "anteater nose" sign. Which anatomic joints are involved in this coalition?

. Talonavicular
. Talocalcaneal
. Calcaneocuboid
. Calcaneonavicular
. Naviculocuneiform

Correct Answer & Explanation

. Calcaneonavicular


Explanation

The "anteater nose" sign is a classic radiographic feature seen on the lateral projection, representing an elongated anterior calcaneal process that bridges toward the navicular. It is pathognomonic for a calcaneonavicular coalition.

Question 3654

Topic: 8. Foot and Ankle

A 25-year-old professional athlete lands awkwardly on a plantarflexed foot. He complains of severe midfoot pain. Initial non-weight-bearing radiographs are normal, but subsequent weight-bearing radiographs reveal a 3 mm widening between the base of the 1st and 2nd metatarsals. What is the most appropriate management for this injury?

. Non-weight-bearing cast for 6 weeks
. ORIF or primary arthrodesis of the tarsometatarsal joints
. Closed reduction and percutaneous pinning
. Immediate weight-bearing in a rigid orthosis
. Corticosteroid injection and taping

Correct Answer & Explanation

. ORIF or primary arthrodesis of the tarsometatarsal joints


Explanation

Weight-bearing radiographs showing >2 mm diastasis between the 1st and 2nd metatarsal bases indicate an unstable Lisfranc injury. Surgical stabilization (ORIF or primary arthrodesis) is indicated for any evidence of instability to restore midfoot anatomy and prevent post-traumatic arthritis.

Question 3655

Topic: 8. Foot and Ankle

A 45-year-old male sustains an acute Achilles tendon rupture while playing tennis. He opts for non-operative management. According to recent literature, which of the following is the most critical factor for optimizing his functional outcome and minimizing the risk of rerupture?

. Early functional rehabilitation with early range of motion
. Prolonged immobilization in strict equinus for 12 weeks
. Serial casting in dorsiflexion
. Immediate full weight-bearing in a neutral walking boot
. Prophylactic use of fluoroquinolone antibiotics

Correct Answer & Explanation

. Early functional rehabilitation with early range of motion


Explanation

Recent high-quality studies demonstrate that non-operative management utilizing early functional rehabilitation protocols yields functional outcomes and rerupture rates comparable to operative treatment, while avoiding surgical complications.

Question 3656

Topic: 8. Foot and Ankle

A 55-year-old female presents with medial ankle pain and a progressive flatfoot deformity. Examination reveals she is unable to perform a single-leg heel raise, but the hindfoot remains flexible and corrects to neutral. Which of the following is the most commonly accepted surgical intervention for this condition?

. Triple arthrodesis
. Flexor digitorum longus (FDL) transfer and medial displacement calcaneal osteotomy
. Isolated subtalar arthrodesis
. Tendo-Achilles lengthening alone
. Tibiotalocalcaneal arthrodesis

Correct Answer & Explanation

. Flexor digitorum longus (FDL) transfer and medial displacement calcaneal osteotomy


Explanation

The patient has Stage II posterior tibial tendon dysfunction (PTTD), characterized by a flexible planovalgus deformity. Standard operative treatment involves a tendon transfer (typically FDL to navicular) combined with a medial displacement calcaneal osteotomy to correct the biomechanical axis.

Question 3657

Topic: Forefoot

A 40-year-old female presents with painful hallux valgus. Weight-bearing radiographs demonstrate a hallux valgus angle (HVA) of 38 degrees and an intermetatarsal angle (IMA) of 16 degrees. There is no hypermobility at the first tarsometatarsal joint. Which of the following surgical procedures is most appropriate to correct her deformity?

. Distal chevron osteotomy
. Proximal metatarsal osteotomy (e.g., Ludloff or Crescentic)
. Akin osteotomy alone
. Keller resection arthroplasty
. First metatarsophalangeal joint arthrodesis

Correct Answer & Explanation

. Proximal metatarsal osteotomy (e.g., Ludloff or Crescentic)


Explanation

An intermetatarsal angle (IMA) > 13 degrees indicates moderate to severe hallux valgus. A proximal metatarsal osteotomy or scarf osteotomy is necessary to provide the magnitude of correction required, as distal osteotomies are insufficient for an IMA of 16 degrees.

Question 3658

Topic: 8. Foot and Ankle
A 62-year-old poorly controlled diabetic male who smokes 2 packs of cigarettes a day sustains a severely displaced intra-articular calcaneus fracture (Sanders Type III). His foot exhibits massive swelling and fracture blisters. What is the most appropriate definitive management?
. Immediate open reduction and internal fixation via an extensile lateral approach
. Open reduction and internal fixation via a sinus tarsi approach after 2 weeks
. Nonoperative management with strict elevation and cast immobilization
. Primary subtalar arthrodesis with structural bone graft
. Primary below-knee amputation

Correct Answer & Explanation

. Nonoperative management with strict elevation and cast immobilization


Explanation

Patients with severe medical comorbidities, including poorly controlled diabetes, peripheral neuropathy, and heavy smoking, are at an unacceptably high risk for catastrophic soft tissue complications and infection with surgical intervention. Nonoperative management is generally preferred in this population.

Question 3659

Topic: Ankle Trauma & Sports

A 35-year-old patient undergoes open reduction and internal fixation of a Weber C fibula fracture. Following anatomic fixation of the fibula, an intraoperative intra-articular hook test is performed, demonstrating 4 mm of lateral shift of the fibula. What is the most appropriate next step in management?

. No further fixation is needed as the fibula is stable
. Fixation of the syndesmosis with trans-syndesmotic screws or dynamic suture buttons
. Open repair of the deep deltoid ligament alone
. Primary temporary external fixation of the ankle
. Tibiotalar transarticular pinning

Correct Answer & Explanation

. Fixation of the syndesmosis with trans-syndesmotic screws or dynamic suture buttons


Explanation

A positive intraoperative hook test after fibular fixation confirms an unstable syndesmotic disruption. Operative stabilization utilizing either syndesmotic screws or dynamic suture button devices is imperative to maintain the anatomic relationship of the distal tibiofibular joint.

Question 3660

Topic: 8. Foot and Ankle

A 28-year-old downhill skier experiences acute posterolateral ankle pain after catching an edge, causing sudden forced dorsiflexion and inversion. Examination reveals swelling posterior to the lateral malleolus and a palpable snapping sensation with ankle circumduction. This clinical presentation is primarily associated with injury to which structure?

. Superior peroneal retinaculum
. Anterior talofibular ligament
. Calcaneofibular ligament
. Inferior extensor retinaculum
. Plantaris tendon

Correct Answer & Explanation

. Superior peroneal retinaculum


Explanation

Acute peroneal tendon subluxation or dislocation classically occurs following forced dorsiflexion and inversion, which ruptures or avulses the superior peroneal retinaculum from its attachment on the posterolateral fibula.