“…Moreover, the optic nerve had been characterized to be a pharmacologic sanctuary, relatively unaffected by systemic chemotherapy. 3,5 Thus, a separate treatment modality, often radiotherapy, is required for the optic nerve involvement of leukaemia. 2,5,6 Here, we report three cases of leukaemia with the leukaemic infiltration of the optic nerve as the initial isolated presentation of disease relapse.…”