Primary pedunculated fibrosarcoma of the peritoneum: a case report.

Fibrosarcoma is a primitive, mesenchymal tumor frequently arising from superficially located soft tissues. A case of a primary intraperitoneal, pedunculated fibrosarcoma is reported, initially presenting as an abdominal mass protruding into a large incisional hernia of the anterior abdominal wall. Despite total tumor resection, multiple intraperitoneal tumor nodules of varying sizes were found and resected six months and one year later. The patient died 18 months after the first surgical intervention. This case illustrates the highly malignant behavior and poor prognosis of fibrosarcomas of the peritoneum.