Sonographic findings in infantile idiopathic nephrotic syndrome.

Abnormal sonographic findings were obtained in all cases of infantile idiopathic nephrotic syndrome (IINS). Hyperechoic renal parenchyma, subcapsular hypoechoic band and loss of cortical medullary differentiation were the commonest abnormalities. There was no specific sonographic difference between the different types of IINS. The subcapsular hypoechoic band is also not diagnostic for IINS. Abnormal sonographic findings indicate renal biopsy to identify specific types of IINS.