%0 Case Reports
%T Xanthogranulomatous Pyelonephritis Presenting as a Psoas Abscess.
%A Mendonça C
%A Freitas S
%A Jesus S
%A Mendonça C
%A Freitas S
%A Jesus S
%J Cureus
%V 14
%N 2
%D Feb 2022
%M 35155047
暂无%R 10.7759/cureus.21967
%X Xanthogranulomatous pyelonephritis (XGP) is a rare form of severe pyelonephritis. It is characterized by progressive parenchymal destruction caused by chronic urinary tract obstruction and infection, typically resulting in a non-functioning enlarged kidney. Its presentation with a psoas abscess is infrequent, and only a few cases are described in the literature. Unlike the typical presenting symptoms of XGP, our patient presented classic symptoms of lumbago. Once the diagnosis was established, antibiotics were given and a nephrectomy was performed. Unfortunately, after the surgery, the patient developed mild monoparesis on the right lower limb with decreased knee extension muscle strength and needed a walking stick for support. Nonetheless, a delayed diagnosis could have been fatal.