Unveiling Poncet Disease: A Rare Presentation with Multiple Tubercular Foci in the Hand and Spine of an Older Patient: A Case Report.

Poncet disease (PD) is a rare form of reactive polyarthritis associated with acute tuberculosis (TB). Multiple TB foci are rare in PD, particularly on the hands. Herein, we describe a case of PD with foci in the trapezium and spine of a 76-year-old man. His medical history included knee arthritis as well as hand and lumbar pain. Radiography and magnetic resonance imaging revealed lytic lesions in the trapezium and spine, which were suspected to be caused by TB infection. An open biopsy of the trapezium and spine was performed. The biopsy results revealed dry necrosis and epithelioid granulation. The diagnosis of PD was made, and the patient was referred to a TB specialty hospital. Our results highlight the importance of considering PD in older patients with multiple TB foci, especially on the hands. Level of Evidence: Level V (Therapeutic).