<prompt> Amputation is often not required in:Gas gangreneBuergersChronic osteomyelitisdiabetic gangrene  <response>: Ans. is c i.e., Chronic Osteomyelitis Amputation is performed in chronic Osteomyelitis, very rarely; in a case with a long standing discharging sinus, especially if the sinus undergoes a malignant change. 