Chromosomal imbalances in Korean intrahepatic cholangiocarcinoma by comparative genomic hybridization

Abstract

Intrahepatic cholangiocarcinoma (ICC) arises from epithelial cells in the intrahepatic bile duct. Until now, only few reports have been available concerning the genetic changes during the progression of ICC. In this study, we analyzed chromosomal aberrations in 19 frozen ICC samples using comparative genomic hybridization. The common chromosomal gains were observed in 8q22-qter (11 cases, 58%),5pl4similar topter(32%),2q33similar toqter (26%),7p (26%),17q2lsimilar toq22 (26%),18q12similar toq2l (26%), and 19q13.1 (26%). DNA amplification was identified in nine tumors (47%). Chromosomal loss was found in Y (60%), 1p34similar topter (37%),4q(32%),18q21similar toqter (32%) l9p (32%), X (32%),5q11similar toq14 (26%), 8p(26%), 9p (26%), and 17p (26%). Chromosomal aberrations identified in this study provide candidate regions involved in the tumorigenesis and progression of ICC. (C) 2005 Elsevier Inc. All rights reserved.