title: Diffuse hepatic angiosarcoma with a portal venous supply mimicking hemangiomatosis.
abstract: We report a case of diffuse hepatic angiosarcoma. Dynamic computed tomography (CT) showed gradual contrast enhancement and homogeneity in the late phase. The tumor was homogeneously hypointense on T1-weighted imaging and hyperintense on T2-weighted imaging, mimicking hemangiomatosis. An angiogram demonstrated intrahepatic arterial encasement, which suggested malignancy. The portal venous supply to the tumor was demonstrated by CT during arterioportography. This probably reflected the continuous infiltration of atypical cells into the dilating sinusoids and may also suggest malignancy.
authors.affiliation: Department of Diagnostic Radiology, Tohoku University Graduate School of Medicine, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai Miyagi 980-8574, Japan. mshkitami@rad.med.tohoku.ac.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kitami
authors.forename: Takayuki
authors.initials: T
authors.lastname: Yamada
authors.forename: Akihiro
authors.initials: A
authors.lastname: Sato
authors.forename: Toshio
authors.initials: T
authors.lastname: Matsuhashi
authors.forename: Haruo
authors.initials: H
authors.lastname: Saito
authors.forename: Tadashi
authors.initials: T
authors.lastname: Ishibashi
authors.forename: Shoki
authors.initials: S
authors.lastname: Takahashi
authors.forename: Mareyuki
authors.initials: M
authors.lastname: Endoh
mesh_terms: D000798:Angiomatosis / Q000000981:diagnostic imaging* / Q000473:pathology; D003937:Diagnosis, Differential; D006394:Hemangiosarcoma / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008099:Liver / Q000098:blood supply; D008107:Liver Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D008113:Liver Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012039:Regional Blood Flow; D014057:Tomography, X-Ray Computed