[Tuberculosis of the talus: a rare localization of Koch's bacillus].

A 66-year-old woman complained of pain in the left rear foot and malleoli. Standard x-ray and magnetic resonance imaging as well as laboratory tests were non-contributive. Pathology study of a bone biopsy led to the diagnosis of talar tuberculosis. A 12-month regimen combining rifampicin, isoniazid and pyrazinamide was given. Clinical improvement was achieved although the patient developed significant reflex dystrophy. The risk of degeneration compromises the functional future of the ankle joint.