title: Malignant hemangiopericytoma of the omentum presenting as an ovarian tumor.
abstract: Malignant hemangiopericytomas are usually found in the musculature of the extremities, the retroperitoneum, and the pelvis. Malignant hemangiopericytoma arising in the omentum is extremely rare. We recently experienced such a case, in which a malignant ovarian tumor was suspected preoperatively on the basis of the sonogram, CT scan, magnetic resonance image, and increased CA-125 value. Microscopically, the tumor showed many mitoses, increased cellularity, and cytologic atypia. The patient was treated with CAP combination therapy following resection of the tumor; however, an intraperitoneal recurrence probably due to implantation was recognized 11 months later.
authors.affiliation: Department of Gynecology and Obstetrics, Kyushu University Faculty of Medicine, Fukuoka, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Imachi
authors.forename: N
authors.initials: N
authors.lastname: Tsukamoto
authors.forename: K
authors.initials: K
authors.lastname: Tsukimori
authors.forename: K
authors.initials: K
authors.lastname: Funakoshi
authors.forename: H
authors.initials: H
authors.lastname: Nakano
authors.forename: T
authors.initials: T
authors.lastname: Shigematsu
authors.forename: A
authors.initials: A
authors.lastname: Tanimura
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006393:Hemangiopericytoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009852:Omentum; D010051:Ovarian Neoplasms / Q000175:diagnosis*; D010534:Peritoneal Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery