Urographic renal size in acute pyelonephritis in childhood.

Eighteen children with acute pyelonephritis were investigated by urography at the time of and about two months after the acute infection. Renal size was evaluated as renal length and parenchymal area. During the acute infection renal size was larger than at the follow-up examination two months later. In conclusion, urography performed in close connection with the acute pyelonephritic infection gives an overestimation of renal size.