Flexor Tenosynovitis and Carpal Tunnel Syndrome with Rice Body Formation Secondary to <i>Mycobacterium kansasii</i> : A Case Report

Introduction: Mycobacterium kansasii is a nontuberculous mycobacterium with rare extra pulmonary manifestations that may be difficult not only to diagnose but also to treat. Successful treatment typically requires surgical debridement and a prolonged course of multi-regimen antibiotic therapy. Case: A 62-year-old patient presented with right index and middle finger pain, swelling, and median neuropathy with rice bodies secondary to chronic Mycobacterium kansasii infection. The patient was successfully treated with two tenosynovectomies and carpal tunnel release followed by 9 months of triple antibiotic therapy. Conclusion: Extrapulmonary Mycobacterium kansasii manifestations are uncommon but require thorough treatment including surgical debridement and extensive antibiotic therapy to eradicate the infection and prevent complications.