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Orthopaedics · Fractures: Lisfranc injury
Sample itemA footballer has midfoot pain and swelling after a twisting injury, and radiographs show a small avulsion between the base of the second metatarsal and the medial cuneiform. Which injury is this?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Lisfranc (tarsometatarsal) injury with the fleck sign
A Lisfranc injury disrupts the tarsometatarsal joint complex, with the Lisfranc ligament running from the medial cuneiform to the second metatarsal base. The fleck sign denotes avulsion of this ligament and indicates instability, often needing fixation.
Option by option
A. Talar neck fracture
A talar neck fracture is a hindfoot injury after dorsiflexion.
B. Calcaneal stress fracture
A calcaneal stress fracture is in the hindfoot.
C. Lisfranc (tarsometatarsal) injury with the fleck sign (correct)
Correct. The fleck sign marks a Lisfranc ligament avulsion.
D. Jones fracture
A Jones fracture is at the proximal fifth metatarsal.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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