Vol 13, No 2 (2022)
Case report
Published online: 2022-10-20

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Eosinophilia caused by Toxocara canis infection

Monika Kowalik1, Aleksandra Gołos, Joanna Góra-Tybor2
Hematology in Clinical Practice 2022;13(2):62-68.


Eosinophilia is defined as an absolute peripheral blood eosinophil count > 0.5 GL. Most often, its intensity is mild. Eosinophilia usually accompanies other diseases such as allergic, rheumatological, infectious, or oncological. The signs depend on the underlying diseases. After starting treatment of the underlying disease, the eosinophil count returns to the reference range. The diagnosis of eosinophilia starts by excluding the secondary causes. Clonal eosinophilia is a rare disease in which eosinophils are part of a tumor clone. The clonality is confirmed by molecular biology methods. The most common eosinophilic infiltration includes skin, lungs, and heart. The symptoms are not connected with a count of eosinophils in blood or bone marrow. The manifestation can be mild but also severe, life-threatening like venous thromboembolism. This article presents a case of 36-year-old man with eosinophilia caused by Toxocara canis infection manifested by systemic symptoms, erythroderma, and liver failure.

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Hematology in Clinical Practice