Adrenal Rest Tumor, also known as adrenal rest neoplasm, is related to adrenal hyperplasia, congenital, due to 21-hydroxylase deficiency and precocious puberty, male-limited. An important gene associated with Adrenal Rest Tumor is CYP21A2 (Cytochrome P450 Family 21 Subfamily A Member 2), and among its related pathways/superpathways are Metabolism and Metapathway biotransformation Phase I and II. Affiliated tissues include liver and ovary, and related phenotypes are Reduced mammosphere formation and endocrine/exocrine gland