肠系膜上静脉血栓形成的发病率低 ,但误诊率较高。本院1988年至 1997年 ,共收治 12例。结合文献资料 ,分析如下。1　临床资料1.1　一般情况　本组男 5例 ,女 7例 (其中 1例妊娠 9个月 ,1例口服避孕药 3年 ) ,年龄 19～ 42 (平均 3 2 .2 )岁。1.2　临床表现　均出现弥漫性中下腹 The incidence of superior mesenteric vein thrombosis is low, but the misdiagnosis rate is high. Our hospital from 1988 to 1997, a total of 12 cases were admitted. Combined with the literature, the analysis is as follows. 1 Clinical data 1.1 General This group of 5 males and 7 females (1 case of 9 months of pregnancy, 1 case of oral contraceptives 3 years), aged 19 to 42 (average 32.2) years of age. 1.2 Clinical manifestations were diffuse in the lower abdomen