Insufficient production of steroid hormones (primarily cortisol) by the adrenal glands.
Comment:
Adrenal insufficiency may cause persistent vomiting, anorexia, hypoglycemia, poor weight gain in a child, or unexplained weight loss in an adult, malaise, fatigue, muscular weakness, unexplained isotonic or hyponatremic dehydration, hyperkalemia, hypotension, hypoglycemia and especially generalized hyperpigmentation.