Page kidney: case report and review of the literature.

Page kidney is caused by the accumulation of blood in the perinephric or subcapsular space, resulting in compression of the involved kidney, renal ischemia, and high renin hypertension. Most patients are young hypertensives with a remote history of blunt trauma to the abdomen or back. We describe a case of acute Page kidney following a renal biopsy in a patient with underlying IgA nephropathy. In addition to the new-onset hypertension, this patient developed a significant decline in renal function due to the inability of the contralateral diseased kidney to compensate. Magnetic resonance imaging (MRI), computed tomography (CT), and ultrasound were valuable in making this diagnosis. Medical and surgical therapeutic options were considered. This report also reviews all previously described cases of Page kidney.