Abstract
The patterns of hypertension in 26 patients with pheochromocytoma were related to the content and turnover rate of catecholamines in the tumor, and to the patterns of urinary excretion of catecholamines and their metabolites. The patients with paroxysmal hypertension were older, and had longer clinical course, larger tumor with an increased catecholamine content, a slower rate of catecholamine turnover and a metabolite dominant pattern of excretion when compared with those in patients with sustained hypertension.