[A case of femoral nerve palsy with malignant lymphoma].

A 52-year-old woman developed right inguinal mass in January, 1998. Biopsy of the mass revealed malignant lymphoma. Chemotherapies were done from February to May, and radiation therapies were done from November to December. She began to suffer from right femoral nerve palsy at the end of April, 1999. Pelvic MRI demonstrated small mass at right lower abdomen. Right abdominal mass became palpable in October, and we diagnosed as relapse of malignant lymphoma. Chemotherapy slightly relieved the femoral nerve palsy. Although mononeuropathy from malignant lymphoma is rare, we should take it into account in differential diagnosis of mononeuropathy.