title: Allelotype analysis of intrahepatic cholangiocarcinoma.
abstract: To identify the chromosomal loci of allelic loss in intrahepatic cholangiocarcinoma (ICC), we performed an allelotype study of 36 ICCs using 55 genome-wide microsatellite markers. Loss of heterozygosity was found most frequently on 8p (65.6%), 17p (64.7%), and 9p (64.5%), followed by 18q (54.2%), 1p (48.5%), 3p (44.8%), 9q (42.1%), 14q (41.7%), 6q (41.7%), and 1q (40.6%). The fractional allelic loss (FAL) values ranged from 0 to 0.731 (mean, 0.322). Analysis of the relationship between FAL values and clinicopathologic parameters disclosed significantly higher FAL values in moderately to poorly differentiated ICCs than in well-differentiated ones (P < .05). In summary, this study defined for the first time the overall number of chromosomes having allelic loss and the chromosomal arms and/or regions potentially involved in the development of ICC.
authors.affiliation: Department of Pathology, Inje University Seoul Paik Hospital, Seoul National University College of Medicine, Korea.
authors.forename: Y K
authors.initials: YK
authors.lastname: Kang
authors.forename: Y I
authors.initials: YI
authors.lastname: Kim
authors.forename: W H
authors.initials: WH
authors.lastname: Kim
mesh_terms: D000483:Alleles; D001650:Bile Duct Neoplasms / Q000235:genetics* / Q000473:pathology; D001653:Bile Ducts, Intrahepatic / Q000473:pathology*; D018281:Cholangiocarcinoma / Q000235:genetics* / Q000473:pathology; D005260:Female; D016147:Genes, Tumor Suppressor; D006801:Humans; D019656:Loss of Heterozygosity; D008297:Male; D018895:Microsatellite Repeats; D008875:Middle Aged; D016133:Polymerase Chain Reaction