<prompt> There is a high risk of renal dysplasia in ?Posterior urethral valve.Bladder ex stroph yAnorectal malformationNeonatal sepsis  <response>: Ans is a Posterior urethral valve The term renal dysplasia is technically a histological diagnosis. It occur due to abnormality in metanephric differentiation and is characterized histologically by the persistence in the kidney of abnormal structures - cailage, undifferentiated mesenchyme and immature collecting ductules and by abnormal lobar organization. CF of Renal dysplasia i It can be unilateral or bilateral and is almost always cystic ii Kidney is enlarged, extremely irregular and multicystic. presents as a flank mass iii In unilateral dysplastic kidney the prognosis is good, where as in BL dysplastic kidney renal failure may ultimately result. Dysplastic kidney is associated with? posterior urethral valve as pa of VURD syndrome V -- posterior urethral valves U -- unilateral reflux R -- renal dysplasia Uretero pelvic obstruction Ureteral agenesis or atresia Other anomalies of lower urinary tract. 