子宫内膜异位症的分布范围甚广。以卵巢受累最为常见.随着病情的不断发展,异位的子宫内膜在卵巢组织中有周期性的出血,使卵巢日益增大而形成囊肿,因囊内液为褐色的粘稠血液,似巧克力糊,故又名为卵巢巧克力囊肿.50％以上为双侧,囊壁厚,包膜呈灰蓝或灰白色,常与周围的阔韧带后叶、子宫壁、 Endometriosis is distributed in a wide range. Ovarian involvement is the most common with the continuous development of the disease, ectopic endometrium in the ovarian tissue in a cyclical hemorrhage, the ovary is growing and the formation of cysts, because the cyst fluid is brown viscous blood, Chocolate paste, it is also known as ovarian chocolate cysts .50% for both sides, wall thickness, capsule gray or blue, often with the surrounding broad ligament posterior leaves, uterine wall,