A Case of a Recurred Retroperitoneal Liposarcoma Diagnosed due to Tumor-related Fever

Abstract

A right retroperitoneal liposarcoma and the right kidney of a 64-year-old female were surgically resected at another hospital 22 years ago. She did not experience any recurrence until she underwent abdominal computed tomography (CT) for the evaluation of sustained fever and a severe inflammatory reaction. The CT scan revealed an 8-cm right retroperitoneal mass. Non-neoplastic causes of fever were ruled out, and the patient underwent excision of the retroperitoneal mass, right hemicolectomy, and partial hepatectomy. The pathological diagnosis was dedifferentiated liposarcoma. The fever and inflammatory reaction was promptly resolved, and the patient was discharged 13 days after surgery. There was no recurrence in the 2 years after surgery. A retroperitoneal tumor is difficult to diagnose and may present with compressive symptoms due to tumor growth. However, diagnosis was conducted due to the occurrence of a tumor-related fever.