ARRS Case of the Week
MUSCULOSKELETAL IMAGING: Lower Leg to Foot
Case Author: Brian D. Petersen, MD, University of Colorado
21-year-old man with lateral right ankle pain; a history of a severe ankle sprain 1 year earlier and several less severe sprains since; and physical examination findings of lateral tenderness and limited dorsiflexion with no objective instability
Axial T1-weighted (A) and T2-weighted fat-suppressed (B) MR images of the right ankle at the level of the malleolar fossa show a low-signal-intensity mass (arrow) in the anterolateral recess of the ankle. A normal anterior talofibular ligament is not present.
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