Transient renal insufficiency in the neonate related to hyperuricemia and hyperuricosuria.

Transient renal insufficiency in the neonate is frequently the result of hypoperfusion of the kidneys due to circulatory compromise and is associated with a normal renal ultrasound scan. We describe an infant with transient renal insufficiency associated with hyperuricemia, hyperuricosuria and increased echogenicity of the renal medullary pyramids. Transient uric acid nephropathy may be a more common occurrence in the neonate than previously recognized.