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  • Title: Chronic eosinophilic leukaemia (CEL): a distinct myeloproliferative disease.
    Author: Weide R, Rieder H, Mehraein Y, Wolf M, Kaiser U, Seifart U, Görg C, Havemann K.
    Journal: Br J Haematol; 1997 Jan; 96(1):117-23. PubMed ID: 9012697.
    Abstract:
    Chronic eosinophilic leukaemia has not yet been clearly defined, mainly due to the fact that it has not been conclusively shown as a monoclonal disease which should be separated from chronic myelogenous leukaemia, acute myelogenous leukaemia with eosinophilia (AML, FAB M4Eo), and the idiopathic hypereosinophilic syndrome. We report a patient with a white blood cell count of 17.6 x 10(9)/l with 74% eosinophils, normal platelet count and haemoglobin. No blasts were seen in the peripheral blood and the percentage of blasts in the bone marrow was < 3%. A diagnosis of chronic eosinophilic leukaemia was made. Chromosome analysis of a bone marrow aspirate disclosed a trisomy 15 together with loss of the Y chromosome. Moreover, FISH analysis on May-Grünwald-Giemsa-stained peripheral blood smears demonstrated trisomy 15 in the eosinophils. 3 months after initial diagnosis the patient went into blast crisis and died. The blast cells exhibited trisomy 15 and loss of the Y chromosome in a complex, aberrant karyotype. In conclusion, the case shows that chronic eosinophilic leukaemia is a monoclonal, myeloproliferative disease with eosinophils as part of the malignant clone. Clinically, chronic eosinophilic leukaemia can be separated into a chronic phase and a blast crisis.
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