尼尔雌醇是一种雌激素制剂,它可以作用于阴道,使阴道上皮细胞增生、成熟,导致阴道增长变宽,表层粘膜变厚且形成皱襞。子宫颈癌患者绝经后妇女居多,由于体内雌激素含量极低,导致阴道粘膜变薄,皱襞消失,从而使子宫颈癌放射治疗过程中,阴道施容器无法放入,但由于放射源距膀胱、直肠太近,使每次腔内放疗时膀胱、直肠接受的放射剂量过 Nylestriol is an estrogen preparation that acts on the vagina to proliferate and mature the vaginal epithelial cells, resulting in widening of the vagina, thickening of the superficial mucosa and formation of folds. Cervical cancer patients are mostly postmenopausal women, due to the very low estrogen levels in the body, leading to thinning of the vaginal mucosa, folds disappear, so that cervical cancer radiation treatment process, vaginal Shi containers can not be put into, but due to radioactive sources from the bladder, Rectum too close, so that each intracavitary radiotherapy bladder, rectal radiation dose received too