Abstract
Cytomorphology as defined by the FAB classification still comprises the backbone of diagnosis of acute leukemias. Cytogenetics and molecular techniques have recently provided new insights into the biology of AML and were found to correlate with morphologic subgroups. Furthermore, the morphologic degree of dysplasia was found to be of prognostic significance although different investigators used different definitions for dysgranulopoiesis (DysG), dyserythropoiesis (DysE), dysmegakaryopoiesis (DysM), and trilineage dysplasia (TLD) and results are controversial.
The clinical significance of cytomorphological aspects and dysplasia was prospectively assessed in the AMLCG-92 trial. Dysplastic features were investigated in 272 patients with newly diagnosed AML. No dysplasia was observed in 34.5% of patients, TLD in 17.6%, all other patients had dysplasia in one or two cell lineages. The overall complete remission (CR) rate in all patients was 73%, no remission (NR) was achieved in 10%, 17% of patients suffered from early death (ED). Patients without any dysplasia achieved CR in 78%, NR in 7%, and ED was 15%. In contrast, TLD patients achieved CR in only 62%, but 23% NR and 15% ED was observed. Median overall survival for patients without any dysplasia was 20 months, but only 10 months for TLD patients (p=0.24). Cytogenetic analyses were available in 66% of patients. Unfavorable karyotypes were observed in 25% of patients with TLD, but in only 6% of patients without any dysplasia (p=0.017). Thus, morphology and cytogenetics provide the means to identify patients with different biology and prognosis in AML and may include informations to adapt treatment strategies accordingly.
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© 1998 Springer-Verlag Berlin Heidelberg
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Haferlach, T. et al. (1998). Biologic Determinants for AML Therapy. In: Hiddemann, W., et al. Acute Leukemias VII. Haematology and Blood Transfusion / Hämatologie und Bluttransfusion, vol 39. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-71960-8_9
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DOI: https://doi.org/10.1007/978-3-642-71960-8_9
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