The sonographic appearance of acute focal pyelonephritis 8 years experience.

Aim: Acute focal pyelonephritis (AFP) is a variant of pyelonephritis in which single or multiple discrete areas show changes of inflammation. The reported sonographic appearances of AFP are varied but are typically described as being echopoor. The purpose of this study was to review the sonographic appearances of AFP and attempt to explain the range of findings by correlation with clinical details.