Brucellosis is a zoonotic disease, seen globally, especially in developing countries and it can
affect many organs. Urinary involvement of this disease is a very rare. Pyelonephritis,
interstitial nephritis, glomerulonephritis, nephropathy are the reported urinary involvements.
In this study, we aimed to report a case of Brucella pyelonephritis, who had complaints
mimicking acute bacterial pyelonephritis, with a history of polycystic kidney disease and
calculi in the left kidney.