title: Hemangiopericytoma: characteristic features observed by magnetic resonance imaging and angiography.
abstract: Hemangiopericytoma is a rare vascular tumor which may originate wherever there are capillaries. We report a case of this tumor occurring in a 79-year-old Japanese man, which originated from the subcutaneous tissues of the left upper arm and reached a size of 6 x 5 x 4 cm. Histopathological and electron microscopical findings were compatible with those of benign-type hemangiopericytoma. Magnetic resonance imaging showed the most intense signal on proton density images. Angiography showed the characteristic tumor feeder artery forming a pedicle which entered the tumor and branched radially and a dense, uniform, well-demarcated, oval tumor stain. These images were helpful in performing proper operative treatment without noteworthy bleeding. These modern modalities are excellent non-invasive treatment without diagnostic procedures for the vascular tumors of soft tissues in dermatology.
authors.affiliation: Department of Dermatology, Otaru City General Hospital, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Kato
authors.forename: S
authors.initials: S
authors.lastname: Kato
authors.forename: H
authors.initials: H
authors.lastname: Ueno
mesh_terms: D000368:Aged; D000792:Angiography; D001132:Arm; D003937:Diagnosis, Differential; D006393:Hemangiopericytoma / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology