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April 30, 2019; 92 (18) Resident & Fellow Section

Teaching NeuroImages: Multifocal cerebral infarcts as a presentation of idiopathic hypereosinophilic syndrome

Andrea Wasilewski
First published April 29, 2019, DOI: https://doi.org/10.1212/WNL.0000000000007407
Andrea Wasilewski
From the University of Rochester, NY.
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Teaching NeuroImages: Multifocal cerebral infarcts as a presentation of idiopathic hypereosinophilic syndrome
Andrea Wasilewski
Neurology Apr 2019, 92 (18) e2178; DOI: 10.1212/WNL.0000000000007407

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A 56-year-old immunocompetent woman presented with severe headaches and encephalopathy. Brain MRI showed numerous punctate infarcts throughout the cerebral and cerebellar hemispheres (figure). White blood cell count was 185,000, of which 97% were eosinophils. Infectious and neoplastic evaluations, including CSF and bone marrow analysis, were unremarkable. The course was complicated by eosinophilic pneumonia, myocardial infarction, and deep venous thrombosis. Endocardial fibrosis was absent. Idiopathic hypereosinophilic syndrome (IHES) was diagnosed. IHES is a leukoproliferative disorder causing multiorgan damage. Diagnosis requires marked peripheral eosinophilia and exclusion of infection, hematologic malignancy, and vasculitis. Infarcts in IHES occur due to microvascular occlusion in watershed regions.1,2

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Figure Axial diffusion-weighted brain MRI

Axial diffusion-weighted MRI shows numerous punctate foci of diffusion restriction in the bilateral cerebral and cerebellar hemispheres, consistent with infarction.

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No targeted funding reported.

Disclosure

A. Wasilewski reports no disclosures relevant to the manuscript. Go to Neurology.org/N for full disclosures.

Footnotes

  • Go to Neurology.org/N for full disclosures.

  • Teaching slides links.lww.com/WNL/A869

  • © 2019 American Academy of Neurology

References

  1. 1.↵
    1. Aida L,
    2. Parkhutik V,
    3. Tembl JI,
    4. Martín N,
    5. Frasquet M,
    6. Bataller L
    . Embolism and impaired washout: a possible explanation of border zone strokes in hypereosinophilic syndrome. J Neurol Sci 2013;325:162–164.
    OpenUrl
  2. 2.↵
    1. Kono Y,
    2. Itoh Y
    . Diffusion-weighted imaging of encephalopathy related to idiopathic hypereosinophilic syndrome. Clin Neurol Neurosurg 2009;111:551–553.
    OpenUrlCrossRefPubMed

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