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Azacitidine is one of the hypomethylating agents available for the treatment of elderly patients with myelodysplastic syndrome (MDS) or acute myeloid leukemia (AML). It is also used as an appropriate treatment of chronic myelomonocytic leukemia (CMML) in the real life setting. As treatment of AML and CMML is not curative, and allogeneic stem cell transplantation (allo-SCT) remains traditionally the only option, significant clinical benefits by hypomethylating agents have been reported. According to the available data, 16% of subjects with MDS who received azacitidine had a complete or partial normalization of blood cell counts and bone marrow morphology, while two-thirds of patients who required blood transfusions no longer needed them. Nevertheless, it can also be hepatotoxic in patients with severe liver impairment and extensive liver tumors. Aim:  to summarize the effect of azacitidine treatment in patients in the light of their general condition, blood count parameters, toxicity (general and hematologic), as well as the presence of cytogenetic aberrations. Materials and Methods:  Twenty-seven patients of which 15 patients with MDS, 9 patients with CMML and 3 patients with AML received azacitidine treatment. The blood count levels and toxicity were followed for a period of twelve months. Results:  22.2% of our patients (6 of 27) of different hematologic diagnoses showed genetic aberrations in their DNA. All they showed quick disease progression and fatal outcome, four of them also developed hematologic toxicity. The remaining 77.8% had no cytogenetic findings. Of all the cohort, 19.05% developed toxicity during the course of the treatment, 38% – decreased leucocyte levels, 14.3% – decreased thrombocyte levels and 18.2% – decreased hemoglobin level. The erythrocyte levels were not substantially influenced by the treatment. The majority of the patients sustained stable levels of red blood cells, as well as of platelets and hemoglobin without remarkable changes between month 0 and month 6 of the treatment. Conclusion:  Our results showed, that the main disadvantage of azacitidine treatment in our patients were progressive leucopenia (in 10/27 patients or 37% of cases) and toxicity (8/27 or 29.6% of cases).

acta medica bulgarica/acta medica bulgarica

Azacitidine Treatment in Patients with Myelodysplastic Syndrome, Chronic Myelomonocytic Leukemia Type 2 and Acute Myeloid Leukemia According to their Cytogenetic Findings