Pituitary Adenoma Masquerading as Diabetic Third Nerve Palsy

A 46-year-old uncontrolled diabetic female visited the ophthalmology outpatient department with a sudden onset of drooping of the upper lid and restriction of movements in adduction, depression, and elevation in the right eye, suggestive of third nerve palsy. Initially, it was thought to be due to a vasculogenic cause due to uncontrolled diabetes, but visual fields revealed bitemporal hemianopia, characteristic of a pituitary adenoma. The diagnosis was confirmed by a CT scan. The patient then underwent a trans-nasal endoscopic removal of the pituitary macroadenoma, followed by a partial recovery of vision.