RESUMEN
Between 1980 and 1994, 162 cases of endocrine based hypertension were diagnosed and treated surgically. Seventy-nine cases (48.7%) of phaeochromocytoma, 63 cases (38.8%) of Cushing's syndrome, and 20 cases (12.3%) of Conn's syndrome were diagnosed. In phaeochromocytoma 75% of the tumours arose from the adrenal glands and 25% arose from the extra-adrenal sites. Cushing's syndrome was caused by adenoma (45%), diffuse bilateral adrenal hyperplasia (36%), pigmented macronodular hyperplasia (9%), and adrenal carcinoma (10%). The most common cause of Conn's syndrome was adenoma (95%) which arose mainly from the left adrenal gland (60%). In the present series the success rate of surgical treatment was 100% for phaeochromocytoma, 90% for Cushing's syndrome and 96% for Conn's syndrome. Trucut biopsy of the kidneys of these patients showed hypertensive changes, the moderate hypertension could be due to renal damage.