Since June 1, 1971 patients undergoing evaluation for hypertension have been evaluated with rapid sequence excretary urography, abdominal aortography and selective renal arteriography. Renal venous assays have been done in selected patients. Through July 31, 1974, 812 arteriographic studies in new hypertensive patients have been done. In 6 of these patients renal tumors were discovered by arteriography only and were not suggested by symptoms, urinalysis nor diagnosed on hypertensive excretory urography. This high incidence surprised us and we hope others will review their arteriographic series of hypertensive patients.