Figure 2. Endocrine activity and tumor size in 68 patients with incidentally detected adrenal masses. The percentage of patients with hormonally active tumors (pheochromocytoma, subclinical Cushing’´s syndrome, and aldosterone producing tumors) increases with the size of the tumor. Shaded bar = hormonally active, solid bar = hormonally inactive. (From Allolio, B., Adrenal Incidentalomas. Adrenal Disorders, ed. C.G. Margioris AN. 2001, Totowa: Humana Press Inc. 249 – 261; with permission.)