The diagnosis of adrenal tumors has increased with a dramatic 2264 % in the last 21 years. Current guidelines on how to handle these patients rely on outdated and biased data. We aim to describe clinical presentation of adrenal tumors and determine their incidence, prevalence and prognosis. Number of new patients diagnosed with or referred for adrenal tumors who have undergone adrenal surgery. Based on preliminary data from the Danish National Patient Registry.