What's your diagnosis? The patient also has kidney cancer. I'll post the correct answer in a few days!
Correct answer: This is a retinal hemangioblastoma, associated with Von Hippel-Lindau syndrome. VHL is caused by a germ-line mutation of a tumor suppressor gene on chromosome 3p (autosomal dominant). It predisposes to bilateral renal cel cancer, retinal and cerebellar hemangioblastoma and pheochromocytoma. It may present with visual impairment or cerebellar signs (e.g. ataxia).