作者: Hiroshi Ohtani , Masakazu Yashiro , Naoyoshi Onoda , Nobuaki Nishioka , Yasuyuki Kato
DOI: 10.1002/(SICI)1097-0215(20000601)86:5<678::AID-IJC12>3.0.CO;2-O
关键词: Gastrointestinal cancer 、 Colorectal cancer 、 Pathology 、 Frameshift mutation 、 Mutation 、 Microsatellite instability 、 Carcinogenesis 、 Loss of heterozygosity 、 Biology 、 Cancer research 、 Bcl-2-associated X protein
摘要: Colorectal (CRC) and gastric cancers (GC), the most common gastrointestinal malignancies, have been known to develop occasionally in a same patient. Previous studies focused on etiology of patients with multiple primary colorectal cancer (MPGCC); however, carcinogenic process MPGCC remains unclear. In this study, we examined genetic alterations order clarify pathway. Twenty sporadic were for microsatellite instability (MSI) frameshift mutations target genes such as TGFbetaRII, BAX IGFIIR. 10 (50%) 20 MPGCC, MSI was present at least 1 lesion GC or CRC. Four 8 cases synchronous displayed both CRC, while only (8%) 12 metachronous exhibited organs. Carcinogenic fairly associated pathway, particularly MPGCC. found 5 (25%) GCs CRCs. involved more closely CRC than among Although MSI-positive infrequent observed genes. Frameshift mutation TGFbetaRII. Only 2 showed case also Our findings suggest that IGFIIR are not main carcinogenesis