In nine of ten hypertensive patients with "atypical" suprarenal aortic stenosis (aged 20 to 51 years, mean 28.5 years), operative treatment of the stenosis reduced blood pressure to normal. In the tenth patient, combined vascular and reno-parenchymal hypertension was effectively treated by drugs, the dosage of which could be reduced after resection. Aorto-aortic bypass was the operative procedure of choice because of its lower risk and better results than other methods. In a review of 346 cases of atypical coarcation reported in the literature, two-thirds were found to be located above or at the level of the renal arteries, causing marked hypertension. Surgical procedures and results in 136 operated cases are tabulated and discussed.