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Chromosomal alterations in paired gastric adenomas and carcinomas

 Yun Hee Kim  ;  Nam-Gyun Kim  ;  Jong Gun Lim  ;  Chanil Park  ;  Hoguen Kim 
 AMERICAN JOURNAL OF PATHOLOGY, Vol.158(2) : 655-662, 2001 
Journal Title
Issue Date
Adenoma/genetics* ; Adenoma/pathology ; Aged ; Aged, 80 and over ; Carcinoma/genetics* ; Carcinoma/pathology ; Chromosome Aberrations* ; Chromosome Deletion ; Chromosome Mapping ; Chromosomes, Human, Pair 17/genetics ; DNA, Neoplasm/genetics ; Female ; Humans ; Male ; Microsatellite Repeats ; Middle Aged ; Nucleic Acid Hybridization/methods ; Stomach Neoplasms/genetics* ; Stomach Neoplasms/pathology
Gastric adenoma is a precancerous lesion of the stomach and its malignant transformation is thought to result from accumulative series of gene alterations. The aim of this study was to determine the pattern of chromosomal changes during gastric carcinogenesis. Pairs of adenoma and carcinoma tissues from 15 gastrectomy cases containing both adenomas and carcinomas in the same (adjacent pairs, 6 cases) and different (non-adjacent pairs, 9 cases) lesions, were analyzed for chromosomal alterations of 39 non-acrocentric chromosomal arms by comparative genomic hybridization (CGH). CGH analysis identified frequent chromosomal alterations in most of the gastric adenomas (14/15, 93%) and all of the carcinomas. The mean number of chromosomal alterations was higher in carcinoma (5.5 for adenoma and 11.7 for carcinoma; P = 0.006, by nonparametric Wilcoxon’s test). Losses on the short arm of chromosome 17 were most common in both adenomas (43%) and carcinomas (67%). The pattern of chromosomal alterations in paired gastric adenomas and carcinomas showed greater similarity compared to the non-case pairs and this similarity was increased in the adjacent pairs. Deletion mapping analysis on chromosome 17p also demonstrated that the conserved deletion area was more frequent in the adjacent pairs. Among these 6 adjacent pairs, all had common deletion areas. In contrast, among the 9 non-adjacent pairs, 2 (22%) had common area of deletion, 5 (56%) showed deletion only in the carcinoma, and the remaining 2 (22%) had no deletion on 17p, suggesting diverse genetic changes might be involved in the multiple tumor formation. Our results that common clonal genetic changes between adjacent pairs of gastric adenomas and carcinomas and accumulated genetic changes in the carcinomas provide evidences for the stepwise mode of gastric carcinogenesis through the accumulation of a series of genetic alterations.
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1. College of Medicine (의과대학) > Dept. of Pathology (병리학교실) > 1. Journal Papers
Yonsei Authors
Kim, Nam Gyun(김남균)
Kim, Hogeun(김호근)
Park, Chan Il(박찬일)
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