子宫内膜异位多发生在盆腔 ,累及泌尿道者占 1.2 % ,其中膀胱最常见 ,约占 84% [1] 。膀胱子宫内膜异位症是一种少见的非肿瘤性病变 ,但易误诊为膀胱肿瘤。我们共收治 2例 ,现结合文献 ,就此病的有关问题讨论如下。1　病例报告例 1,2 8岁 ,婚后 2年不孕。Ｂ超发现膀胱左侧壁有 Endometriosis occurred in the pelvic cavity, involving the urinary tract accounted for 1.2%, of which the most common bladder, accounting for about 84% [1]. Bladder endometriosis is a rare non-neoplastic disease, but often misdiagnosed as bladder cancer. We treated a total of 2 cases, are now combined with the literature, the disease related issues discussed below. Case reports 1, 2 8 years old, infertility 2 years after marriage. B-found in the left side of the bladder there