title: Bright-dark ring sign in MR imaging of hepatic epithelioid hemangioendothelioma.
abstract: We describe the imaging findings in a rare case of multifocal nodular form of hepatic epithelioid hemangioendothelioma on ultrasound (US) and dynamic contrast-enhanced spiral computed tomography (CT) and MRI. The nodules showed multilayered target appearance on MR images with prominent peripheral rim with high signal intensity (SI) on T1-weighted and very low SI on T2-weighted images, corresponding to thrombosed vascular channels. The above combination of imaging findings is to our knowledge distinct and should suggest the diagnosis of hepatic epithelioid hemangioendothelioma.
authors.affiliation: 2nd Department of Radiology, General University Hospital ATTIKON, National and Kapodistrian University of Athens, Greece.
authors.forename: Nikos
authors.initials: N
authors.lastname: Economopoulos
authors.forename: Nikolaos L
authors.initials: NL
authors.lastname: Kelekis
authors.forename: Stylianos
authors.initials: S
authors.lastname: Argentos
authors.forename: Christina
authors.initials: C
authors.lastname: Tsompanlioti
authors.forename: Pavlos
authors.initials: P
authors.lastname: Patapis
authors.forename: Ioanna
authors.initials: I
authors.lastname: Nikolaou
authors.forename: Athanassios
authors.initials: A
authors.lastname: Gouliamos
mesh_terms: D000328:Adult; D003287:Contrast Media; D018323:Hemangioendothelioma, Epithelioid / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D036542:Tomography, Spiral Computed; D014463:Ultrasonography
chemical_list: D003287:Contrast Media