Pediatric refers to infants, children and adolescents. Endocrinology is the science of endocrine glands, which secrete hormones. So a Pediatric Endocrinologist is a "Hormone Doctor for children". The endocrine glands include the hypothalamus, the pituitary, the thyroid, the parathyroid, the pancreas, the adrenal glands, the testicles, and the ovaries. Endocrine disorders often manifest as disorders of growth and puberty. However, many other non-endocrine disorders may also manifest themselves as disorders of growth and puberty. But there are also other signs and symptoms that may relate to endocrine disorders, such as: abnormal thirst and frequency of urination, high or low blood sugars (diabetes or hypoglycemia), high or low calcium levels, increased lipids/cholesterol, overactive or underactive thyroid glands, thyroid cancer, abnormal hairiness or other signs of virilization, overactive or underactive adrenal glands, adrenal tumors, inborn errors of metabolism that relate to hormones and development of the genital system, etc.