Acute pseudotumor of the orbit.

A case is presented of a 22-year-old man with a history of bilateral eye injection, lacrimation, and rhinorrhea. The right orbit was inflamed and its globe proptotic, with medial and lateral gaze deficits. Tomography revealed swelling about the right lacrimal gland. He was admitted and treated with high-dose steroids, which caused regression of his symptoms. This presentation and response to steroids is pathognomonic for acute pseudotumor of the orbit, a condition rarely described in the emergency medicine literature. If left untreated, pseudotumor of the orbit may progress to blindness and ophthalmoplegia.