Increased renal cortical echogenicity: a normal finding in neonates and infants.

Abstract
The kidneys of 32 [human] infants (ages 1 day-6 mo.) were examined sonographically. Accentuated corticomedullary differentiation was demonstrated in all of them. This is apparently a normal finding in neonatal kidneys. Anatomic and physiologic speculations are given to explain this phenomenon.

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