Expect the Unexpected: Mycobacterial Infection in Post Total Knee Arthroplasty Patients.

Orthopaedic Surgeons rarely encounter mycobacterial infections in Post Total Knee Arthroplasty (TKA) patients. We present series of two cases to create awareness among clinicians to expect the unexpected. Tuberculosis typical/ atypical is a hidden culprit in catch clinical situations when chronic infection is Suspected, but the lab investigations are negative in persistently symptomatic patients. In such situations clinicians should suspect atypical or complex mycobacterial infections and evaluate the patients accordingly. Clinical suspicion, evaluation, isolation and treatment of atypical or complex mycobacterial infections with sensitive chemotherapy, leads to complete resolution of infection and full functional rehabilitation.