title: The findings of ruptured hepatocellular carcinoma on helical CT.
abstract: To evaluate the helical CT findings of ruptured hepatocellular carcinoma (HCC), 12 patients with ruptured HCC were reviewed with regard to the tumour's location, size and contour protrusion, the appearance of the mass, the enhancement pattern, multiplicity and secondary changes. All ruptured tumours were located at the periphery of the liver and had a protruding contour. The maximum diameter of tumours ranged from 2 cm to 16 cm. Discontinuity of the hepatic surface was seen in 11 cases. In eight cases, CT images during the arterial phase showed a non-enhancing low attenuating lesion with focal discontinuity and peripheral rim enhancement. Seven cases showed separation of tumour content from the peripheral enhancing rim and intraperitoneal rupture of tumour content into the perihepatic space. Because of the similar appearance to an enucleated orbital globe with remaining sclera, this was termed the "enucleation sign". As well as ruptured masses, 10 cases with non-ruptured masses also showed a non-enhancing low attenuating pattern. Seven cases showed a haematoma with high attenuation around the ruptured mass. The peripheral location, protruding contour, discontinuity of the hepatic surface and surrounding haematoma are helpful signs in the diagnosis of ruptured HCC. The "enucleation sign" may be a characteristic finding in ruptured HCC.
authors.affiliation: Department of Radiology, College of Medicine, The Catholic University of Korea.
authors.forename: B G
authors.initials: BG
authors.lastname: Choi
authors.forename: S H
authors.initials: SH
authors.lastname: Park
authors.forename: J Y
authors.initials: JY
authors.lastname: Byun
authors.forename: S E
authors.initials: SE
authors.lastname: Jung
authors.forename: K H
authors.initials: KH
authors.lastname: Choi
authors.forename: J Y
authors.initials: JY
authors.lastname: Han
mesh_terms: D000328:Adult; D000368:Aged; D006528:Carcinoma, Hepatocellular / Q000000981:diagnostic imaging* / Q000473:pathology; D005500:Follow-Up Studies; D006406:Hematoma / Q000000981:diagnostic imaging; D006801:Humans; D008107:Liver Diseases / Q000000981:diagnostic imaging; D008113:Liver Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012422:Rupture, Spontaneous / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed