隐睾是常见的睾丸先天性异常，而单侧隐睾较为常见。出生时睾丸约有１％～７％未降，其中大部分在出生后数月内下降，小部分在几年内下降，至青春期睾丸尚未下降则就无自然下降的可能。隐睾肿瘤的发生率为正常人２０～４０倍，所以早期发现隐睾并行手术治疗尤为重要。１　资料 Cryptorchidism is a common testicular congenital abnormalities, while unilateral cryptorchidism is more common. About 1% to 7% of the testes at birth did not drop, most of them decreased within a few months after birth, a small part of decline in a few years, to the adolescent testis has not declined without the possibility of natural decline. The incidence of cryptorchidism tumors 20 to 40 times normal, so early detection of cryptorchidism surgery in parallel is particularly important. 1 data