Septic arthritis of the pubic symphysis in a patient undergoing chemotherapy for lung adenocarcinoma

A 69-year-old woman was diagnosed with lung adenocarcinoma in the right upper lobe in 2003, and underwent right upper and middle lobectomy. In 2005, she was administered anti-cancer chemotherapy for disease recurrence. In 2008, the patient was hospitalized with fever, general malaise, and a pain in the pubic region during chemotherapy. We suspected the presence of a metastatic lesion in the pubic bone; however, methicillin-resistant Staphylococcus aureus (MRSA) was detected on blood culture. After the administration of anti-MRSA agents, the pain in the pubic region alleviated Based on the clinical course and the findings of pelvic magnetic resonance imaging, the patient was diagnosed with septic arthritis of the pubic symphysis. Here, we describe a rare case of septic arthritis of the pubic symphysis in a patient undergoing chemotherapy for lung cancer.