A rare cause of nasal obstruction: giant invasive nonfunctioning pituitary adenoma.

Nasal obstruction is a very rare symptom caused by a pituitary adenoma. A 57-year-old man admitted to our clinic with bilateral nasal obstruction for the last six months. Endoscopic examination revealed soft pinkish pulsatile tissues in both nasal cavities. Radiologic investigation revealed a suprasellar mass extending to the frontal lobes, spheno-ethmoidal sinuses and nasal cavities. He had bitemporal superior quadrant hemianopsia. Pituitary hormone levels were normal. Biopsies were taken from the patient endonasally. Pathological evaluations and laboratory findings were compatible with nonfunctioning pituitary adenoma.