Violation of the activity of which glands causes diseases such as diabetes, gigantism; cretinism?

Diabetes is associated with a lack of insulin in the body. This hormone is produced by the pancreas. Dysfunction of the gland can be associated with improper diet, excess weight, a sedentary lifestyle, and so on. Gigantism and cretinism are associated with malfunctioning of the thyroid gland. Gigantism is associated with an excess of growth hormone – somatropin. But all these diseases can be suppressed and live absolutely normal. Doctors prescribe special medications that contain the necessary hormones.