[A Case of Septic Arthritis in the Hip Joint Following a Long‒Term Chemotherapy for Breast Cancer].

A 67‒year‒old woman, who had been receiving chemotherapy for 16 years because of recurrences of breast cancer, suffered from arthrosis in the left hip joint. A total hip joint replacement was needed. The central venous catheter port was removed a month before the operation. The culture of the catheter revealed Staphylococcus aureus. During the operation, a gram‒positive coccus was detected in the synovium of the hip joint. Therefore, the replacement was terminated, and an irrigation was performed. Two months later, a replacement of the hip joint was successfully performed after an antibacterial therapy. The patient died of the cancer 1 and a half years later. Septic arthritis secondary to catheter infection is a disease to consider in patients with long‒term chemotherapy.