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- W2044999095 abstract "Gastric cancers are rarely diagnosed before the age of 40 years and the incidence reaches a peak during the 7th decade in the general population. A molecular mechanism of early tumor onset may be determined by comparing microsatellite instability (MSI), indicative of error-prone mismatch repair, and loss of heterozygosity (LOH) between gastric cancers in patients ≤40 years of age and those of older ages. Three to 5 chromosomal loci, where MSI and/or LOH are commonly found in gastric cancers in the general population, were examined in formalin-fixed, paraffin-embedded samples from 102 patients ≤40 years of age using a polymerase chain reaction-based non-radioactive screening method. MSI and/or LOH at a minimum of 1 locus were detected in 11/102 patients. The frequency of MSI and/or LOH at the D11S904 locus was significantly higher than that at the D2S119, D2S123, D5S409 and IFNA regions. No preferential genetic changes at the D11S904 locus were observed in elderly patients. Among several clinicopathological variables, a statistically significant association with MSI and/or LOH was observed only for tumors located at the cardia, compared with tumors at the antrum and the corpus. Our findings suggest that a unique mechanism may be involved in increasing the susceptibility of the D11S904 locus for either MSI or LOH, especially for cardia tumors in young patients. Early onset of gastric cancers in patients ≤40 years of age is associated with genetic changes at preferential chromosomal loci, including D11S904. Int. J. Cancer 82:59–62, 1999. © 1999 Wiley-Liss, Inc." @default.
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- W2044999095 date "1999-07-02" @default.
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- W2044999095 title "Microsatellite instability and/or loss of heterozygosity in young gastric cancer patients in Italy" @default.
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- W2044999095 doi "https://doi.org/10.1002/(sici)1097-0215(19990702)82:1<59::aid-ijc11>3.0.co;2-2" @default.
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