title: Two small intrahepatic cholangiocarcinomas with different sonographic appearances.
abstract: We report on 2 cases of small intrahepatic (or peripheral) cholangiocarcinomas initially detected by sonography and completely resected. The lesions had a peripheral hypoechoic component and a central isoechoic or hyperechoic component. One had posterior acoustic shadowing on sonography, and the other did not. Comparison with pathologic findings in both cases indicated that severe fibrotic changes may have caused the posterior acoustic shadowing. This finding is extremely rare. We found only 1 previously reported case of cholangiocarcinoma accompanied by acoustic shadowing.
authors: Department of Gastroenterology, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo 105-8470, Japan.
authors: T
authors: T
authors: Yamamoto
authors: K
authors: K
authors: Takeuchi
authors: C
authors: C
authors: Okuda
authors: H
authors: H
authors: Honjo
authors: N
authors: N
authors: Sakurai
authors: G
authors: G
authors: Watanabe
authors: M
authors: M
authors: Mori
authors: Y
authors: Y
authors: Kuyama
mesh_terms: D000162:Acoustics; D018281:Cholangiocarcinoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D005355:Fibrosis; D006801:Humans; D008113:Liver Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D014463:Ultrasonography