Diffusion and perfusion imaging in subacute neurotoxicity following high-dose intravenous methotrexate

April F. Eichler, Tracy T. Batchelor, John W. Henson

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Methotrexate (MTX) is a widely used chemotherapeutic agent that can cause acute, subacute, and chronic neurological complications. Subacute MTX neurotoxicity is manifest by abrupt onset of focal cerebral dysfunction occurring days to weeks after MTX administration, usually in children. We describe the neuroimaging features of an adult patient with primary CNS lymphoma who presented with transient aphasia and right hemiparesis 12 days after receiving intravenous high-dose MTX (8 g/m2) chemotherapy. Imaging within 1 h of symptom onset showed bilateral symmetrical restricted diffusion involving white matter of the cerebral hemispheres. CT angiogram and dynamic susceptibility MRI showed no evidence of vasospasm or perfusion defect. MRI five days later showed near-complete resolution of the abnormalities. MRI 31/2 months later showed normal diffusion but new hyperintense T2-weighted signal changes in the subcortical white matter corresponding to previous areas of restricted diffusion. The absence of vascular or perfusion abnormalities suggests that transient cytotoxic edema in white matter may explain the syndrome of subacute MTX neurotoxicity.

Original languageEnglish (US)
Pages (from-to)373-377
Number of pages5
JournalNeuro-Oncology
Volume9
Issue number3
DOIs
StatePublished - Jul 2007
Externally publishedYes

Keywords

  • Adult
  • Diffusion
  • Methotrexate
  • Neurotoxicity

ASJC Scopus subject areas

  • Oncology
  • Clinical Neurology
  • Cancer Research

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