title: Imaging findings of mimickers of hepatocellular carcinoma.
abstract: Radiological imaging plays a crucial role in the diagnosis of hepatocellular carcinoma (HCC) as the noninvasive diagnosis of HCC in high-risk patients by typical imaging findings alone is widely adopted in major practice guidelines for HCC. While imaging techniques have markedly improved in detecting small liver lesions, they often detect incidental benign liver lesions and non-hepatocellular malignancy that can be misdiagnosed as HCC. The most common mimicker of HCC in cirrhotic liver is nontumorous arterioportal shunts that are seen as focal hypervascular liver lesions on dynamic contrast-enhanced cross-sectional imaging. Rapidly enhancing hemangiomas can be easily misdiagnosed as HCC especially on MR imaging with liver-specific contrast agent. Focal inflammatory liver lesions mimic HCC by demonstrating arterial-phase hypervascularity and subsequent washout on dynamic contrast-enhanced imaging. It is important to recognize the suggestive imaging findings for intrahepatic cholangiocarcinoma (CC) as the management of CC is largely different from that of HCC. There are other benign mimickers of HCC such as angiomyolipomas and focal nodular hyperplasia-like nodules. Recognition of their typical imaging findings can reduce false-positive HCC diagnosis.
authors.affiliation: Department of Medical Imaging, Toronto General Hospital, University of Toronto, Toronto, ON, Canada.
authors.forename: Tae Kyoung
authors.initials: TK
authors.lastname: Kim
authors.affiliation: Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Eunchae
authors.initials: E
authors.lastname: Lee
authors.affiliation: Department of Medical Imaging, Toronto General Hospital, University of Toronto, Toronto, ON, Canada.
authors.forename: Hyun-Jung
authors.initials: HJ
authors.lastname: Jang
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006391:Hemangioma / Q000150:complications / Q000000981:diagnostic imaging; D006509:Hepatitis B / Q000150:complications; D006801:Humans; D007249:Inflammation / Q000000981:diagnostic imaging; D008099:Liver / Q000000981:diagnostic imaging; D008103:Liver Cirrhosis / Q000150:complications / Q000000981:diagnostic imaging; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D065626:Non-alcoholic Fatty Liver Disease / Q000000981:diagnostic imaging; D011859:Radiography; D014463:Ultrasonography
keywords: Benign neoplasms; Carcinoma, Hepatocellular; Diagnostic imaging; Liver