WHEN THE UNILATERAL nonfunctioning kidney as demonstrated by intravenous pyelogram studies is associated with hypertension, the question of a remedial lesion arises. Renal hypertension and other entities may constantly mimic this condition. Modern physicians have the unique opportunity of making diagnostic and therapeutic contributions in the approach to surgical hypertension.1,2 Report of a Case A 44-year-old obese Negro female presented a nonfunctioning left kidney demonstrated by intravenous pyelogram. The patient had an 11-year history of hypertension. On admission the patient was relatively asymptomatic. She denied having headaches, palpitations, profuse diaphoresis, anxiety, muscular weakness, paresthesia, or polyuria. The abnormal physical findings were limited to a nonpulsating, slightly movable, palpable left para-umbilical mass 10 × 15 cm in diameter. No bruits were ausculated over the mass. The pelvic examination yielded negative results. The patient was afebrile and her blood pressure was 170/110 mm Hg. Laboratory Findings.— The blood and urinary findings