case_images: PMC4836141_01
case_images: a Goldmann perimetry showing inferior suppression of the visual field center in the right eye. b Right funduscopic examination showing normal coloring of the optic disc. c Axial T1-weighted MRI showing an oval tumor at the orbital apex (arrow). The mass was isointense to gray matter. d A coronal T2-weighted MRI showing a hyperintense tumor (blue arrow) to gray matter between the medial (yellow arrow) and inferior rectus muscles (yellow arrowhead). The optic nerve (blue arrowhead) is sandwiched by both the tumor and the superior rectus muscle/levator palpebrae superioris complex (green arrow). e Courses of best-corrected visual acuity and CFF. VA = Visual acuity.
case_images: cop-0007-0179-g01.jpg
case_images: PMC4836141_01_cop-0007-0179-g01.jpg
case_images: F1
case_images: Goldmann perimetry showed inferior suppression of the right visual field center (fig. 1a), but no abnormalities on the left. A funduscopic examination showed normal coloring of the right optic disc (fig. 1b). Computed tomographic and magnetic resonance images (MRI) indicated an oval orbital mass located between the medial and inferior rectus muscles at the orbital apex (fig. 1c, d). After the first cycle of steroid pulse therapy, her visual acuity improved to 0.6 OD, although the CFF in the right eye did not show significant change (11 Hz) (fig. 1E).