Diabetes mellitus causes

Explanation

Diabetes insipidus : Deficiency of Vasopressin causes a disease called diabetes insipidus. It does not involve loss of sugar in urine.
Diabetes mellitus : Under secretion of insulin by the pancreatic gland increases the level of glucose in blood is called hyperglycemia. Prolonged hyperglycemia leads to a disease called diabetes mellitus, associated with loss of glucose through urine and formation of ketone bodies.