目的调查5067例3岁以下婴幼儿先天性肾盂积水的患病率。
Objective To investigate the prevalence rate of congenital hydronephrosis in 5067 nurseling under 3 years.
梗阻、扩张引起的肾盂积水导致了感染。
The stasis from the obstruction and dilation led to infection.
超声显像：它可展示肾盂及肾盏的扩大程度，及可在胎儿期诊断肾积水。
Ultrasonography — This will reveal the degree of dilatation of the renal pelvis and calices and allows for diagnosis of hydronephrosis in the prenatal period.
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