Fig. 1.

Development of presumed left optic nerve head gumma over time. At initial presentation the patient had an inferior altitudinal defect on the pattern deviation of the automated Humphrey visual field (a) a hyperemic and swollen left optic disc (c) a normal right optic disc (b) and no signs of optic nerve enhancement on the coronal T1 post-contrast magnetic resonance imaging (MRI) (d). Five months later, the patient's visual field progressed (e), the left optic nerve head was elevated and hyperemic with superotemporal pallor (g) with the right optic nerve head remaining unchanged (f) and the MRI showed left optic nerve enhancement on the coronal T1 post-contrast BRAVO MRI (H).