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- W2622430905 abstract "OBJECTIVE: To characterize the clinical, MRI, and pathology findings in an unusual case of multifocal necrotizing leukoencephalopathy (MNL) developing after systemic methotrexate (MTX). BACKGROUND: There is a variety of neurotoxicities associated with systemic or intrathecal administration of MTX. MNL typically occurs after combined MTX and cranial RT (Rubinstein et al 1975) and is typically irreversible and fatal. DESIGN/METHODS: Case Report. RESULTS: At age 36, the patient was treated with CHOP-R for systemic Non-Hodgkin lymphoma. Two months after treatment he was diagnosed with ocular and leptomeningeal lymphoma and received high-dose (8gm/M 2 ) intravenous MTX. He developed progressive vision loss and left limb weakness during treatment and immediately after the 5 th dose became somnolent and awoke with severe left limb paresis. He was referred for further evaluation. Exam revelaed bilateral optic atrophy, mild left facial weakness, severe left limb weakness, confusion and agitation. Review of serial brain MRIs showed development of multifocal T2/FLAIR hyperintensities in cerebral hemisphere white matter, basal ganglia and cerebellum, mild contrast enhancement, without restricted diffusion. Homozygosity for MTHFR C677T was identified in blood. Cerebellar lesion biopsy revealed vacuolization and sparse axonal swelling, consistent with myelinolysis, and lipid-laden macrophages. CSF metabolites consistent with MTX toxicity were elevated, but must be interpreted with caution because CSF was contaminated by RBC. He was treated with high dose folic acid and memantine. Six months later, blindness persists but his mentation and limb weakness are significantly improved. CONCLUSIONS: MNL occurs almost exclusively following combined intrathecal or systemic MTX and brain RT. This case adds to the repertoire of neurotoxicity of systemic MTX monotherapy. The pathology findings are identical to MNL after combination treatment except for less evidence of axonal damage. It is speculative if his clinical improvement is attributable to therapy with folic acid and memantine or to a milder degree of tissue injury than is typical of MNL. Disclosure: Dr. ElHag has nothing to disclose. Dr. Cohen has nothing to disclose. Dr. Bardentstein has nothing to disclose. Dr. Peerboom has nothing to disclose. Dr. Cole has nothing to disclose. Dr. Sloan has nothing to disclose. Dr. Rogers has received personal compensation for activities with Sigma Tau Pharmaceuticals as a speaker." @default.
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- W2622430905 date "2013-02-12" @default.
- W2622430905 modified "2023-09-27" @default.
- W2622430905 title "Biopsy-Proven Multifocal Necrotizing Leukoencephalopathy Following Systemic Methotrexate Monotherapy for CNS Metastasis of Non-Hodgkin Lymphoma (P01.107)" @default.
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