[Adrenal gland tumors].

Adrenal masses are one of the most common tumors in humans. They are a very heterogenous group of diseases and include benign and malignant adrenocortical lesions, metastases, pheochromocytomas and other entities. Adrenal masses originating from steroidogenic or chromaffin cells may be silent or the source of subclinical or overt hormone excess, such as primary aldosteronism, hypercortisolism or symptomatic catecholamine excess. On the other hand, adrenal hyperplasia may be the result of excess ACTH secretion in steroid biosynthesis disorders with deficient glucocorticoid secretion, in glucocorticoid resistance, in Cushing's disease, or ectopic ACTH syndrome. Algorithms for endocrine testing, imaging studies and their combination are available for defining the tumor entity and for the characterization of the hormone excess syndromes. Recent developments in molecular biology have provided tools for testing for hereditary tumor syndromes associated with adrenal tumorigenesis and to establish strategies for further treatment and follow-up.