为评价子宫内膜异位症(内异症)患者存在癌症的危险性,对瑞典1969～1983年22 207例诊断为内异症(按国际疾病分类标准)者进行长期随访。最后有20 686例进入此定群研究。观察时间从进入研究群的日期(首次内异症入院日期)到出现癌症诊断、移民、死亡或观察结束日期(1989年12月31日)。结果:在随访的20 686例中,自然增长至 To assess the risk of cancer in patients with endometriosis (endometriosis), 22 207 cases of endometriosis (according to the International Classification of Diseases) from 1969 to 1983 in Sweden were followed up for a long time. Finally, 20,686 cases entered this cohort study. The time of observation ranged from the date of entry into the study group (date of admission for the first endometriosis) to the date of the end of the cancer diagnosis, immigration, death, or observation (December 31, 1989). Results: In the 20,686 follow-up cases, the natural increase to