| Summary: | Notwithstanding extensive chemotherapy, intrathecal methotrexate treatments and prophylactic central nervous system radiotherapy, extramedullary relapses can still be seen in leukemia patients. Isolated optic nerve relapses, one of its symptoms being a sudden vision loss that occurs prior to a bone marrow relapse, are rarely seen in acute lymphoblastic leukemia patients. Sudden vision loss can be cured by an early diagnosis and rapid treatment. In this study, we investigate two male patients (10 and 12 years old) with optic nerve relapses, sudden vision loss complaints and pre-T acute lymphoblastic leukemia in the light of the literature. [Cukurova Med J 2014; 39(4.000): 894-899]
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