Adrenalectomy group: mean age 44.3 yo, ratio of male female 1/1, 8, hormonal changes 51/71, mean tumor size 51.2 mm, right tumor 41/71, left tumor 30/71, retroperitoneal laparoscopic adrenalectomy 46/71, open adrenalectomy 25/71, mean operative time 102.1 minutes, mean estimated blood loss 56.4 mL.