A Case of Tuberculous Myositis of Thigh Requiring Abscess Resection Due to Reactivated Mycobacterium Tuberculosis

Abstract

 Most Mycobacterium tuberculosis infections are pulmonary tuberculosis, but occasionally extrapulmonary tuberculosis occurs in organs other than the lungs. Extrapulmonary tuberculosis most often occurs in the lymph nodes or chest wall, and tuberculous myositis is very rare.
 A 71-year-old man with a history of pulmonary tuberculosis developed swelling and pain in his thigh during oral steroid therapy. Muscle biopsy and culture tests were performed, and Mycobacterium tuberculosis was detected. Because there were no other active tuberculosis lesions, he was diagnosed with tuberculous myositis. It is thought that his tuberculosis had reactivated due to immunosuppression caused by steroid use, which resulted in myositis. He was initially treated with anti-tuberculosis drugs; however, as an inter-muscular abscess formed, we performed surgical resection. Postoperatively, there was no recurrence of myositis.