title: Primary stromal tumor of the omentum: Report of a case.
abstract: We report the case of a primary extragastrointestinal stromal tumor (EGIST) found in the omentum of a 65-year-old woman. The resected specimen, which measured 6 cm at its largest point, consisted of an outer solid part and inner uniloculated cysts. Microscopically, the tumor was characterized by interlacing bundles of elongated spindle cells, with the nuclei showing a focal palisading pattern; however, skenoid fibers were not observed anywhere and mitoses were absent. Immunohistochemically, the tumor was negative for smooth-muscle actin, desmin, and S-100 protein, but it was positive for CD117 and CD34. The microscopic features were consistent with a gastrointestinal stromal tumor.
authors.affiliation: Department of Pathology, Faculty of Medicine, Zonguldak Karaelmas University, Tip Fakültesi Patoloji AD, Kozlu, 67600, Zonguldak, Turkey.
authors.forename: Banu Dogan
authors.initials: BD
authors.lastname: Gun
authors.forename: Mustafa Ozkan
authors.initials: MO
authors.lastname: Gun
authors.forename: Ziya
authors.initials: Z
authors.lastname: Karamanoglu
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D046152:Gastrointestinal Stromal Tumors / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D007150:Immunohistochemistry; D007813:Laparotomy; D009852:Omentum; D010534:Peritoneal Neoplasms / Q000175:diagnosis* / Q000601:surgery