BACKGROUNDMycobacterial tuberculous tenosynovitis of the extensor tendon sheath is an extremely rare manifestation of extrapulmonary tuberculosis. 1 CASE PRESENTATIONA 46-year-old man without history of previous illness presented to our rheumatology department with a history of swelling of the left wrist which gradually increased in size and which appeared 5 months before the presentation. No history of wrist trauma was found. There was no associated history of fever, loss of weight, night sweats nor fatigue. Physical examination revealed a well looking man with a non-painful left wrist swelling located in front of the extensor tendon, measuring approximately 4×4 cm. Movements of the wrist were limited at the extension.

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