A pituitary adenoma is a benign (non-cancerous) tumour of the pituitary gland — a pea-sized gland at the base of the brain that regulates multiple hormones. Adenomas are classified by size (microadenoma <1 cm, macroadenoma ≥1 cm) and by hormonal activity (functioning: prolactinoma, acromegaly, Cushing's disease; non-functioning). Large adenomas compress the optic chiasm, causing characteristic bitemporal visual field loss. Treatment depends on the tumour type: prolactinomas are primarily treated with dopamine agonists; most other adenomas require surgery. At Medanta Hospital, Secro 50, Noida, Dr. Vaish performs endoscopic transnasal pituitary surgery.


