Reversed Diastolic Flow in Page Kidney Following Native Kidney Biopsy: Case Report

Page kidney phenomenon occurs due to external compression of a kidney by either subcapsular or perinephric hematoma, tumor, lymphocele, or urinoma. This article describes a case of reversed diastolic arterial flow on Doppler insonation in a Page kidney due to external compression as a consequence of native kidney biopsy-induced perinephric hematoma. Reversed diastolic arterial flow has already been reported in Page kidney in renal allografts; however, we are not aware of any report of such a finding in a native kidney. This report highlights the importance of being aware of the possible occurrence of the reversion of the diastolic flow in Doppler sonography in Page kidney, even though it is rare. Moreover, this case illustrates the short but severe impact of Page kidney on renal function and suggests that a conservative approach is an effective treatment option even in a moderate to severe perinephric hematoma.