Isolated Optic Nerve Relapse in a Pediatric Patient With T-Cell Lymphoblastic Leukemia: A Brief Report.
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Isolated optic nerve (ON) relapse is a rare occurrence in lymphoblastic leukemia (LBL). A 10-year-old boy with T-LBL presented 8 months after diagnosis with blurred vision and thickening of right ON on magnetic resonance imaging consistent with relapse. Cerebrospinal fluid and bone marrow were negative for leukemia. He received reinduction chemotherapy (including nelarabine and craniospinal radiation) followed by a myeloablative matched sibling donor bone marrow transplant. He remains in remission 2 years post-transplant with normal vision. We also review the literature for reports of isolated ON relapse in patients with LBL. Our patient's clinical course demonstrates that disease control can be achieved with early detection of ON relapse before disease progression.