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输精管缺如是发生率较高的输精管先天性异常,研究发现1%~2%的不育男子患有双侧输精管缺如;本病可以发生在单侧或双侧,以单侧多见。一组综合90例统计资料[1],报告单侧者74例,双侧仅16例。一般认为可能胚胎发育过程中,中肾管发育停止、闭锁或变性,导致输精管缺如。最新研究发现95%有肺囊泡纤维症的男子会出现输精管缺如,因此认为本病与纤维囊性病有关,往往合并附睾发育不全或缺如,甚至精囊、射精管、输尿管及膀胱三角区缺
The lack of vas deferens is a high incidence of vas deferens congenital abnormalities found that 1% to 2% of infertile men suffering from bilateral absence of the vas deferens; the disease can occur in one or both sides to unilateral more common. A group of 90 cases of comprehensive statistics [1], reports of unilateral 74 cases, bilateral only 16 cases. It is generally believed that in the process of embryo development, the development of the renal tube stops, locks or degeneration, resulting in absence of the vas deferens. The latest study found that 95% of men with vesicular vesicle disease will appear lack of vas deferens, so that the disease associated with fibrocystic disease, often associated with epididymal growth or absence, and even seminal vesicle, ejaculatory duct, ureter and trigone lack