title: Hemangiopericytoma of the sigmoid mesentery: report of a case with immunohistochemical findings.
abstract: Hemangiopericytoma has been described in various sites in the body but only rarely in the mesocolon. This report describes the clinical course of an 83-year-old man whose mesosigmoidal tumor (hemangiopericytoma) was resected on 11 November 1994. Immunostaining was done with the following primary antibodies: alpha-actin, vimentin, factor VIII-related antigen, chromogranin, and S-100. Staining for factor VIII-related antigen was strongly positive in the endothelial cells of the capillaries, but negative in the tumor cells. The tumor cells contained immunoreactive vimentin, but demonstrated no alpha-actin, chromogranin, or S-100. Since the operation, the patient has been disease-free for 11 months.
authors.affiliation: Department of Surgery, Furano Kyokai Hospital, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nakagawa
authors.forename: Y
authors.initials: Y
authors.lastname: Shinoda
authors.forename: Y
authors.initials: Y
authors.lastname: Masuko
authors.forename: T
authors.initials: T
authors.lastname: Ohshima
authors.forename: K
authors.initials: K
authors.lastname: Shirota
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshida
authors.forename: K
authors.initials: K
authors.lastname: Ogawa
authors.forename: J
authors.initials: J
authors.lastname: Uchino
mesh_terms: D000199:Actins / Q000032:analysis; D000368:Aged; D000369:Aged, 80 and over; D006393:Hemangiopericytoma / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D009418:S100 Proteins / Q000032:analysis; D012811:Sigmoid Neoplasms / Q000473:pathology*; D014746:Vimentin / Q000032:analysis; D014841:von Willebrand Factor / Q000032:analysis
chemical_list: D000199:Actins; D009418:S100 Proteins; D014746:Vimentin; D014841:von Willebrand Factor