Introduction

Page kidney results from a perirenal haematoma or a mass around the kidney, which causes extrinsic compression on the renal parenchyma and is a very rare cause of secondary hypertension.1 Page kidney, first described in 1939 by Page in an animal model with cellophane papers wrapped round the kidney, results in a consequent decrease in renal blood flow, hyperreninemia, hypertension and deterioration of renal function. We experienced Page kidney during a course of granulomatosis with polyangiitis (Wegener's) (GPA), with CT findings showing accumulation of blood in the perinephric space due to a spontaneous perinephric haemorrhage (SPH).