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김희종(Hee Jong Kim),최정매(Jung Mae Choi),허원영(Won Young Huh),김한식(Han Sik Kim),김상균(Sang Kyoon Kim),조진웅(Jin Woong Cho),김민철(Min Chul Kim),김문중(Mun Joong Kim) 대한내과학회 1992 대한내과학회지 Vol.43 No.6
Background: There have been many reports about the multiple primary cancers, and they have played a role to study the pathogenesis of the cancer. Methods: During 25 years from 1967 until 1991, 22946 primary cancers had registered at the Presbyterian Medical Canter, and there were 68 cases of multiple primary cancers compatible with Warren k Gates' criteria. Among them 29 cases were multiple primary cancers associated with gastric cancer. Results: The incidence of multiple primary cancers associated with gasric cancer is 0.13% in total primary cancers (0. 38% in total stomach cancers, 42,6% in total multiple primary cancers). All stomach cancers were adenocarcinomas. The other sites except for stomach are esophagus (8; all squamous cell carcinomas), liver (4; all hepatocellular carcinomas), uterine cervix (4; all squamous cell carcinomas), larynx (3; all squamous cell carcinomas) and miscellaneous (10). The ratio between synchronous and metachronous (interval more than 6 months) is 1.07:1, and the average time interval between first and second cancer in the metachronous cases is 5, 7 years. The 9 cases of 14 metachronous cases were treated with chemotherpy of radiation therapy after first surgery. Conclusion: The multiple primary cancers associated with gastric cancer may be largely caused by exposure to the same carcinogens in the contiguous aerodigestive organs and also iatrogenic causes play an important role in the pathogenesis of the multiple primary cancers.