title: Intraosseous epithelioid hemangioendothelioma of the mandible: a case report with an immunohistochemical study.
abstract: Epithelioid hemangioma is the prototype of a group of vascular tumors characterized by epithelioid endothelial cells. Hemangioendothelioma of bone is a rare lesion that constitutes less than 0.5% of primary malignant skeletal tumors. We report and discuss a case of epithelioid hemangioendothelioma arising intraosseously in the anterior portion of the mandible in a 76-year-old woman. The case was treated successfully by wide resection. Radiographically, the tumor mass showed osteolysis and expansion. Histologically, the tumor showed invasive and destructive growth, although it lacked frequent mitotic figures and severe atypia. On immunohistochemical study, tumor cells exhibited characteristics of mesenchymal and endothelial origin, i.e., strong to moderate immune reactivity against vimentin, factor VIII-related antigen (F8RA), Ulex europaeus agglutinin type 1 lectin (UEA-1), and CD 34, but not against keratin, epithelial membrane antigen (EMA) or S-100 protein (S100). The proliferating cell nuclear antigen (PCNA)-positive cell index was 27.5%. These pathological findings suggested a borderline malignant potential for this tumor. Thus, clinically, wide resection with or without dissection of regional lymph nodes is recommended.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Ehime University School of Medicine, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Hamakawa
authors.forename: T
authors.initials: T
authors.lastname: Omori
authors.forename: T
authors.initials: T
authors.lastname: Sumida
authors.forename: H
authors.initials: H
authors.lastname: Tanioka
mesh_terms: D000368:Aged; D018952:Antigens, CD34 / Q000032:analysis; D005260:Female; D018323:Hemangioendothelioma, Epithelioid / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D006801:Humans; D037102:Lectins / Q000032:analysis; D008339:Mandibular Neoplasms / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D009361:Neoplasm Invasiveness; D009363:Neoplasm Proteins / Q000032:analysis; D009383:Neoplasms, Vascular Tissue / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D037121:Plant Lectins; D014746:Vimentin / Q000032:analysis; D014841:von Willebrand Factor / Q000032:analysis
chemical_list: D018952:Antigens, CD34; D037102:Lectins; D009363:Neoplasm Proteins; D037121:Plant Lectins; C036850:Ulex europaeus lectins; D014746:Vimentin; D014841:von Willebrand Factor