Report of one interesting case--unilateral kidney agenesis associated with ipsilateral kidney malrotation, anal atresia and pulmonary artery failure.

Aim: Renal agenesis is a fairly common congenital anomaly with an unknown definite etiology. Unilateral renal agenesis is much more common than bilateral renal agenesis, but it usually does not carry any major health consequence, as long as the other kidney is healthy. In some cases, renal agenesis may by associated with other congenital anomalies.