Extranodal NK/T-Cell Lymphoma Occurring Primarily in the Eyes and with Central Nervous System Relapse

A 56-year-old man complaining of blurred vision was referred to the ophthalmol-ogist. He was initially diagnosed with uveitis and showed no response to steroid treatment. Diagnostic vitrectomy and skin lesion biopsy performed later confirmed the diagnosis of extranodal NK/T cell lymphoma (ENKTL), nasal type. Despite sufficient systemic che-motherapy, the patient developed central nervous system (CNS) relapse 3 months after achieving systemic remission. The diagnosis and treatment of this patient required multi-disciplinary teamwork between ophthalmologists, pathologists, and hematologists. This report focused on the diagnostic planning and optimal treatment strategy for this patient.