The Page kidney: a correctable form of arterial hypertension.

The Page kidney is a remediable form of renal hypertension. It is usually seen in young male patients with an antecedent history of blunt renal trauma, followed by a subcapsular or perirenal hematoma causing compression of the renal parenchyma and hypertension. Radiographic studies demonstrate the presence of an extrinsic mass compressing the kidney. Divided function studies and renal vein renin determinations confirm the functional significance of this process in the etiology of hypertension. Treatment may initially consist of observation. However, if hypertension persists then decortication and evacuation of the encysted fluid are indicated. In long-standing cases, although nephrectomy may be necessary, the chance of relieving hypertension is excellent.