Tuberculosis arthritis of the ankle mimicking a talar osteochondritis.

Tuberculosis arthritis of the ankle accounts for 10% of all cases of osteoarticular tuberculosis (OT). Because of its rarity and insidious symptoms, diagnosing it may be challenging. Furthermore, its imaging findings mimic those of other diseases. The case of ankle tuberculosis arthritis misdiagnosed as talus necrosis is reported. The difficulties faced by clinicians when confronting such situations are also illustrated.