Elbow arthroplasty complicated by Mycobacterium tuberculosis infection: A case report

INTRODUCTION: Total elbow arthroplasty (TEA) is an orthopedic procedure that is relatively infrequently performed, but its use has been increasing over time. Infection remains one of the most concerning complications after TEA, although Mycobacterium tuberculosis (TB) as a microbial etiology, is extremely rare. Here, we present a case of M. tuberculosis infection after TEA. PATIENT CONCERNS: A 45-year-old woman underwent TEA for severe traumatic arthritis of the elbow following failure of conservative treatment. Four months after TEA, the patient experienced progressive elbow pain and swelling, without other external signs of infection such as a sensation of local heating and erythematous alterations. DIAGNOSIS: Pulmonary computed tomography showed stable pulmonary TB in the right upper lobe. The T-SPOT, TB, and purified protein derivative test results were positive, and M. tuberculosis exhibited growth on cultures. The final diagnosis was periprosthetic infection of M. tuberculosis. INTERVENTIONS: The patient was treated with debridement with submission of deep tissue cultures. According to these cultures and suggestions of a bacteriologist, anti-TB treatment was administered for 12 months. OUTCOMES: The symptoms of the infection were controlled, and the prosthesis was retained. At the time of writing this case report, the elbow prosthesis had survived for more than 2 years, and no recurrent infection had been observed. CONCLUSION: The diagnosis of TB infection after TEA is difficult to confirm due to its nonspecific signs and symptoms. Despite the extremely low incidence, failure to consider this possibility for diagnosis can lead to delayed treatment. Proper diagnosis allows for antitubercular therapy with retention of a prosthesis.