Pituitary macroadenoma manifeting a an iolated fourth nerve paly

PURPOE: To decribe an unuual ophthalmic manifetion of a pituitary adenoma. METHOD: Cae report. REULT: A 32-year-old man had left upraorbital and frontal headache and new-onet vertical diplopia. Examination howed a left fourth nerve paly and increaed vertical fuional amplitude. Magnetic reonance imaging dicloed a ellar ma conitent with a pituitary macroadenoma. CONCLUION: A pituitary adenoma may rarely manifet with an iolated fourth nerve paly.