Other commonly reported symptoms include anterior pituitary dysfunction, visual field defects, headache/pain, and ophthalmoplegia. Treatment
Treatment options depend on the type of tumor and on its size:

Prolactinomas are most often treated with cabergoline or bromocriptine (both dopamine agonists), which decrease tumor size as well as alleviates symptoms, followed by serial imaging to detect any increase in size. Treatment, where the tumor is large, can be with radiation therapy, proton therapy or surgery, and patients generally respond well. Unlike prolactinomas, thyrotrophic adenomas characteristically respond poorly to dopamine agonist treatment. Somatotrophic adenomas respond to octreotide or lanreotide, which are long-acting somatostatin analogs. These somatostatin receptor analogs inhibit secretion of growth hormone. They were found to be about 50–55% effective in reducing tumor mass and reducing growth hormone and insulin like growth factor 1 (IGF-1) levels in studies. The growth hormone receptor antagonist pegvisomant is also used in the treatment of somatotrophic adenomas. Pegvisomant blocks the action of growth hormone. It can either be used as monotherapy or combined with a somatostatin analog. Surgery is a common treatment for pituitary tumors. The normal approach is trans-sphenoidal adenectomy, which usually can remove the tumor without affecting the brain or optic nerves. Radiation is also used to treat pituitary adenomas. Examples include external beam or proton beam radiation therapy or stereotactic radiosurgery. External radiation of pituitary adenomas can arrest tumor growth for several years but pituitary failure develops within 10 years in most patients necessitating lifelong hormone replacement.
Some tumors secrete more than one hormone, the most common combination  being GH and prolactin, which present as unexpected bone growth and unexpected lactation (in both men and women).A patient with pituitary adenoma may present with visual field defects, classically bitemporal hemianopsia. It arises from the compression of the optic nerve by the tumor. The specific area of the visual pathway at which compression by these tumours occurs is at the optic chiasma. The anatomy of this structure causes pressure on it to produce a defect in the temporal visual field on both sides, a condition called bitemporal hemianopsia. If originating superior to the optic chiasm, more commonly in a craniopharyngioma of the pituitary stalk, the visual field defect will first appear as bitemporal inferior quadrantanopia, if originating inferior to the optic chiasm the visual field defect will first appear as bitemporal superior quadrantanopia. Lateral expansion of a pituitary adenoma can also compress the abducens nerve, causing a lateral rectus palsy.Also, a pituitary adenoma can cause symptoms of increased intracranial pressure. Prolactinomas often start to give symptoms especially during pregnancy, when the increased hormone level estrogen can increase the tumors growth rate.Various types of headaches are common in patients with pituitary adenomas. The adenoma may be the prime causative factor behind the headache or may serve to exacerbate a headache caused by other factors.