Pediatric adrenocortical tumours.

Childhood adrenocortical tumors (ACTs) are rare, representing ∼0.2% of all pediatric malignancies and having an incidence of 0.2-0.3 new cases per million per year in the United States, but incidences are remarkably higher in Southern Brazil. At diagnosis, most children show signs and symptoms of virilization, Cushing syndrome, or both. Less than 10% of patients with ACT exhibit no endocrine syndrome at presentation, although some show abnormal concentrations of adrenal cortex hormones. Pediatric ACT is commonly associated with constitutional genetic and/or epigenetic alterations, represented by germline TP53 mutations or chromosome 11p abnormalities. Complete tumor resection is required to achieve cure. The role of chemotherapy is not established, although definitive responses to several anticancer drugs are documented. For patients undergoing complete tumor resection, favorable prognostic factors include young age, small tumor size, virilization, and adenoma histology. Prospective studies are necessary to further elucidate the pathogenesis of ACT and improve patient outcomes.