RESUMEN
Objective: To determine the clinical features and postnatal outcome of all antenatally detected hydronephrosis cases
Methods: A retrospective review of the collected data for all infants with antenatal hydronephrosis who were seen at Queen Alia Hospital during the period between Feb 2010 and April 2013. The degree of hydronephrosis was defined as mild, moderate, severe, based on the antero- posterior pelvic diameter that was measured after 30 weeks of gestation. Patients were divided into group I [with unilateral hydronephrosis] and group II [with bilateral hydronephrosis and ureteric dilatation]. Post natal evaluation and follow up was uniformly done. Causes and clinical outcomes were compared between the two groups
Results: A total of 80 infants enrolled in this study. Fifty seven [71%] were male and 23 [29%] were female with a male: female ratio [2.5: 1]. The left kidney was more commonly involved [left: 34, right: 18]. Group I had 52 patients, 4 [8%] required surgery. Group II had 23 patients, 7 [30%] required surgery. Transient hydronephrosis was the commonest cause of antenatal hydronephrosis [33%] followed by pelviureteric junction obstruction [PUJO] [31%], and vesicouretral reflux [27%]. Posterior urethral valve and vesicouretral junction obstruction were seen in [4%], [3%] respectively
Conclusions: Antenatal hydronephrosis requires close follow up during antenatal and postnatal period. Patients with mild unilateral and bilateral antenatal hydronephrosis run a relatively benign course and require limited, infrequent ultrasonography follow up. Those with bilateral moderate to severe hydronephrosis require extensive or further work up and close follow up