The adenopituitary gland consists of the distal, intermediate and nodal parts. The main functions of the adenopituitary gland are to secrete growth hormone, thyroid-stimulating hormone, adrenocorticotropic hormone, and gonadotropin, the latter three of which promote the secretory activities of the thyroid gland, adrenal cortex, and gonadotropic glands, respectively. Growth hormone promotes the growth of bone and soft tissues. If the hormone is underproduced at an early age, it can lead to dwarfism; if growth hormone is overproduced, it can cause gigantism before skeletal maturity and acromegaly after skeletal maturity. If the pituitary gland is hypopituitarized and does not secrete enough thyroid hormones, adrenal hormones, and gonadal hormones, it can lead to hypothyroidism, hypoadrenocorticism, and underdevelopment of sexuality.