Surgical treatments include rubber band ligation , sclerotherapy , cryotherapy and surgical excision . surgical excision is reserved for patients with more severe haemorrhoid or those whose symptoms are not relieved by more conservative treatments 手术治疗包括结扎、硬化治疗、冷冻治疗及切除手术，切除手术只会用于病情比较严重或经过保守治疗而徵状未有改善的病人。
Of these , 3 cases ( 4 eyes ) underwent two sessions of treatment , 4 cases ( 7 eyes ) progressed to stage iv and stage v rop , one eye had a dragging disc and the other eyes had complete resolution of the abnormal tissue 接受冷冻治疗的21例41只眼中，有3例4只眼接受两次冷冻治疗，有4例7只眼于术后恶化进行至第四期、第五期早产儿视网膜病变，有1例1只眼术后有视乳头黄斑部拉曳的现象。
Five eyes ( 16 % ) developed chronic angle closure glaucoma due to peripheral anterior synechia . one could be controlled by chronic medical therapy , three required trabeculectomy , the another one even required cyclocryotherapy because poor iop control after trabeculectomy 5只眼( 16 % )因周边前黏连发生慢性隅角闭锁性青光眼，其中1只眼可以药物控制， 3只眼需做小梁切除术，另1只眼做小梁切除术后眼压仍无法控制而接受睫状体冷冻治疗。
All samples of the tumor tissues were observed by electron microscope . the t lymphocyte subsets and b lymphocytes were detected and counted with monoclonal antibody technique before and after the cryotherapy . results : the cured percentage of internal hemorrhoid , mixed hemorrhoid and chronic fissura ani reached 83 . 5 % , 66 . 8 % and 62 . 4 % respectively . the clearance rate of the verruca acuminata was 100 % 方法：取自西京医院15年间冷冻治疗肛肠区良性病变7018例，恶性病变636例，冷冻前后经电镜观察癌细胞变化及应用单克隆技术检测患者t细胞亚群、 b细胞水平。
