Leucocytosis and Stroke in a Lung Cancer Patient.

Eur J Case Rep Intern Med

Division of Hematology and Oncology, University of California Los Angeles, Los Angeles, CA, USA.

Published: August 2020

Unlabelled: Significant leucocytosis in the setting of an underlying malignancy may be attributed to several causes and is not uncommon; however, extreme leucocytosis (>50×10 cells/l) and hypereosinophilia is less common and may represent a paraneoplastic syndrome. The underlying mechanism is thought to be bone marrow stimulation by tumour-produced cytokines, most notably interleukin-5 (IL-5) and granulocyte-macrophage colony-stimulating factor (GM-CSF). This paraneoplastic syndrome is likely reflective of extensive disease and dissemination, and options for treatment are limited but include tumour resection, corticosteroids and hydroxyurea. In this report, we discuss an unusual case of known stage III lung adenocarcinoma presenting with an ischaemic stroke and extreme leucocytosis and hypereosinophilia.

Learning Points: To illustrate an unusual presentation of progression of non-small-cell lung adenocarcinoma.To highlight the prognostic significance of extreme leucocytosis and hypereosinophilia in patients with an underlying malignancy.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7655007PMC
http://dx.doi.org/10.12890/2020_001872DOI Listing

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