Abstract
Ureteropelvic junction obstruction is usually intrinsic and is most common in children. Multiple renal arteries have been reported to occur in approximately 30% of cases( with a preponderance on the left side. With respect to the presence of multiple renal arteries, by a study of Sampaio et al.9), an inferior “accessory” or “aberrant” artery was found to cross anteriorly to the UPJ in 6.8% of the cases. In few specimens this inferior accessory artery pass close to the UPJ. Therefore, the presence of an anomalous vessel crossing the UPJ and causing obstruction is a very rare finding). Aberrant renal arteries to the inferior pole cross anteriorly to the ureter and may cause hydronephrosis. We describe a 52-year-old woman with hydronephrosis due to UPJ obstruction by an aberrant renal artery and review the literature in brief.
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