Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Congenital adrenal hyperplasia ?
    ### Response:
    Congenital adrenal hyperplasia (CAH) refers to a group of genetic conditions that affect the adrenal glands. These glands sit on top of the kidneys and are responsible for releasing various types of hormones that the body needs to function. Affected people lack an enzyme the adrenal glands need to make one or more of these hormones and often overproduce androgens (male hormones such as testosterone).
    