我院于１９９０年～１９９９年收治胃癌、食管癌、肝癌、肺癌（以下简称四癌）共２７６６例。现将四癌的发病分布以及院内感染的发病情况进行分析。１临床资料１．１一般资料：四癌２７６６例，其中男２１０４例，占７６％，女 ６６２例，占 ２４％，年龄 ２０～ ７６岁，平均? In our hospital from 1990 to 1999, we treated 2766 cases of gastric cancer, esophageal cancer, liver cancer, and lung cancer (hereinafter referred to as “four cancers”). The distribution of the four cancers and the incidence of nosocomial infections are analyzed. 1 Clinical data 1.1 General information: There were 2766 cases of four cancers, of which 2104 were males, accounting for 76%, 662 were females, accounting for 24%, and the average age was 20-76 years.