title: Arterial macroaneurysm on the optic disk presenting as a mass lesion.
abstract: A 66-year-old man presented with a gray-yellow mass on the optic disk associated with retinal hemorrhage and a branch retinal artery obstruction. Follow-up over a several-month period disclosed the disappearance of the yellow tissue and the presence of a retinal arterial macroaneurysm. Such a lesion should be considered in the differential diagnosis of tumors of the optic nerve head.
mesh_terms: D000368:Aged; D000783:Aneurysm / Q000175:diagnosis* / Q000473:pathology; D003390:Cranial Nerve Neoplasms / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005451:Fluorescein Angiography; D006801:Humans; D008297:Male; D009898:Optic Disk / Q000098:blood supply*; D009901:Optic Nerve Diseases / Q000175:diagnosis*; D012161:Retinal Artery