Abstract
Posterior Urethral Valve (PUV) is the most common cause of lower urinary tract obstruction in male fetus at the antenatal period. Keyhole sign of urethra, distention of bladder caused by the obstruction and bilateral ureters and pelvicalyceal dilatation can be determined secondary to vesicoureteral reflux. The degree and duration of obstruction determine the prognosis and kidney damage. At antenatal period ultrasound (USG) is the first and the most widely used imaging modality in diagnosis of PUV. As a complementary and an ancillary method MRI is preferred in both maternal and fetal causes. Our case shows the contribution of MRI in the diagnosis of PUV.
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