Left eyelid swelling and pain rule out orbital cellulitis. There is mild swelling and enhancement of the left preseptal soft tissues, but no evidence of postseptal extension. Indeed, the left globe, extraocular muscles, lacrimal gland, orbital fat, and optic nerve are intact. The right orbit is unremarkable. There is no evidence of mass lesions or drainable fluid collections. There is an unchanged 6 mm diameter high T1 and low T2 signal nodule in the suprasellar cistern along the median eminence of the pituitary stalk. There is a small right maxillary sinus retention cyst. There are partially imaged findings related to apicoectomy at tooth #8 for a periapical granuloma.
1. Findings compatible with left preseptal cellulitis, but no evidence of postseptal cellulitis or abscess.2. An unchanged 6 mm diameter nodule in the suprasellar cistern along the pituitary stalk may represent a ectopic neurohypophysis or perhaps a Rathke cleft cyst. 