Abstract
A case synchronously documented quadruplicate carcinomas, well differentiated squamous cell carcinoma and small cell carcinoma in the lung, adeno-squamous cell carcnoma in the esonhgus and well diffrentiated adenocarcinoma in the stomach, is reported. Occupation, smoking habit and alcohol consumption seems to play an important role as a carcinogenesis in this case. Increases of the frequency occurrng either synchronously or metachronously, as a second or a third independent carcinoma may become a serious problem in the near future, since the ratio of aged people has been increased in recent years.
