A RESECTED CASE OF A GIANT MALIGNANT FIBROUS HISTIOCYTOMA(MFH)OF THE RETROPERITONEUM

Abstract

A 41-year-old woman, who was operated on for inguinal hernia at another hospital in October 2003, developed abdominal distention and heartburn after the operation and was referred to the hospital with a diagnosis of an abdominal tumor. Operation was performed on June 2, 2004. The tumor was present on the right side of the retroperitoneum, the superior margin of the tumor was adjacent to the liver and duodenum, the inferior margin to the common iliac artery and vein, and the inner side to the ureter; the ascending colon and right kidney were pushed up inward. The tumor was dissected from the surrounding retroperitoneum and resected associated with fascia of the iliopsoas muscle, while the right kidney was preserved. The resected tumor was 40×29×17cm in dimension and 7108g in weight. From pathological findings that the tumor was concomitantly composed of a part of storiform proliferation of spindle-shaped cells and a part where spindle-shaped cells were rough and had mucous matrix, malignant fibrous histiocytoma (MFH) was diagnosed. No signs of recurrence have been observed as of 5 months after the operation.
Since giant retroperitoneal MFH is thought to be rare, this case is reported together with some bibliographical comments.