Takayasu arteritis and renovascular hypertension in childhood.

Takayasu arteritis with renal artery involvement was the cause of severe persistent hypertension in eight children under 12 years of age. Features of severe hypertension dominated the clinical picture. Unequal or absent pulses were found in three patients. An irregular contour of the descending thoracic aorta on the chest roentgenogram was an early clue to the diagnosis. On aortography both renal arteries were affected in five patients, although a discrepancy in kidney size on excretory urography had suggested a unilateral lesion. Total aortography is mandatory to outline the full extent of the vascular abnormalities. All the patients had strongly positive tuberculin skin tests, and, although mycobacteria were not isolated, all patients received antituberculous as well as antihypertensive therapy. Nephrectomy of the worse kidney is contraindicated if the renal arteries are asymmetrically involved, for fear of later extension of the arteritis. Takayasu arteritis is an important cause of severe persistent hypertension in nonwhite children.