Result It is suggested that crypt of gland bleeding,residual of prostatic contracture of bladder neck and cast form stone in prostatic urethra and bladder neck are the main causes of reoperation.

• 结果再手术主要原因为腺窝出血、腺体残留、膀胱颈挛缩和膀胱及前列腺段尿道铸型结石形成等。