Abstract
A 64-year-old female suffering from lung cancer was treated with crizotinib. Two years later, whitish massive optic disc oedema was observed in the right eye. The fluorescein angiography results were suggestive of uveitis but also revealed leakage from the optic disc, retinal veins, and capillaries in the posterior retina and the periphery. These findings remained for over a year without deterioration of vision and disappeared immediately after crizotinib was replaced with alectinib. Late-onset ocular toxicity by crizotinib was strongly suspected, given the clinical course. This is the first report precisely documenting crizotinib-induced morphological changes in the optic disc and retina.