Symptoms Caused by Pituitary Adenomas Pituitary adenomas are generally thought of as either hormone- producing or hormone-inactive tumors 1.Hormone-producing pituitary adenomas produce an active hormone in excessive amounts. 2.Hormone-inactive(non-functional)pituitary adenomas typically cause problems related to the size of the tumor Symptoms Caused by Pituitary Adenomas uPituitary adenomas are generally thought of as either or hormone-inactive tumors produce an active hormone in excessive amounts. typically cause problems related to the size of the tumor