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AJR 2005; 184:1157-1162
© American Roentgen Ray Society

Original Report

Detection of Combined Hepatocellular and Cholangiocarcinomas on Enhanced CT: Comparison with Histologic Findings

Akihiro Nishie1, Kengo Yoshimitsu1, Yoshiki Asayama1, Hiroyuki Irie1, Hitoshi Aibe1, Tsuyoshi Tajima1, Kenji Shinozaki1, Tomohiro Nakayama1, Daisuke Kakihara1, Mitsuo Shimada2, Shin-ichi Aishima3, Kisaku Yoshida4 and Hiroshi Honda1

1 Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka 812-8582, Japan.
2 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Higashi-ku Fukuoka 812-8582, Japan.
3 Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Higashi-ku Fukuoka 812-8582, Japan.
4 Department of Radiology, Fukuoka City Hospital, Yoshizukahonmachi, Hikata-ku Fukuoka 812-0046, Japan.

OBJECTIVE. The purpose of this study was to evaluate the performance of enhanced CT in making a diagnosis of combined hepatocellular and cholangiocarcinomas (HCC-CCs) by comparing CT findings with histologic findings.

CONCLUSION. One third (nine of 27 cases) of the combined HCC-CCs were correctly diagnosed on enhanced CT by detailed analysis of the enhancing pattern around or within the mass. Various factors such as an atypical enhancing pattern, the size of each component, and the presence of a mass composed of intermediate tumor cells—that is, cells with intermediate characteristics between HCC and CC—were found to be the causes of misdiagnosis of combined HCC-CC on enhanced CT.


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