The computed tomographic (CT) findings of a classic case of Page kidney (hypertension resulting from compression of the renal parenchyma by a subcapsular hematoma) is presented. An excretory urogram and renal arteriogram performed prior to the CT study resulted in nonspecific findings. The CT findings of a well circumscribed, elliptically shaped, low density, subcapsular hematoma producing parenchymal compression was correlated with the onset of hypertension following remote trauma, permitting the CT diagnosis of Page kidney.