The inflammation associated with infection of the kidneys is called “pyelonephritis”.
[rarediseases.org]
fetal lobulation (7/26, 12%), scarring (7/57, 12%), dysplastic kidneys (3/57, 5%), unilateral agenesis (2/57, 4%), renal calculi (1/57, 2%), vesicoureteric reflux with pyelonephritis
[jmg.bmj.com]