Clinico-hematological and molecular genetic variability of acute myeloid leukemia with CD7 expression on blasts cells

S.V. Gritsayev1, Z.V. Chubukina1, I.S. Martynkevich1, I.I. Kostroma1, T.V. Glazanova1, Ye.V. Petrova1, L.S. Martynenko1, S.A. Tiranova1, N.A. Potikhonova1, I.S. Zyuzgin2, L.N. Bubnova1, and K.M. Abdulkadyrov1

1 Russian Research Institute of Hematology and Transfusiology, FMBA, Saint Petersburg, Russian Federation

2 Leningrad Regional Hospital, Saint Petersburg, Russian Federation


The objective of the study was to evaluate the heterogeneity of patients with acute myeloid leukemia with CD7 aberrant expression. The retrospective analysis of 31 AML patients’ laboratory and clinical data was performed. Marked morphological, cytogenetic, and molecular heterogeneity of AML with CD7 coexpression was established. Also, it was found that these patients could be stratified into groups by overall survival. Four patients with t(8;21) or t(15;17) translocations or inv(16) inversion were followed-up for 53, 33, 11, and 10 months, respectively. The median of OS was not reached among the patients with t(8;21), t(15;15), and inv(16). The median OS among 10 patients with normal karyotype with no FLT3-ITD mutation was 17 months. The median OS among 17 patients with other genetic abnormalities including 7 patients with normal karyotype and FLT3-ITD mutation was 8 months; p = 0.033. We conclude that CD7 expression on AML blast cells is not an independent prognostic factor.

Keywords: acute myeloid leukemia, myeloblasts, CD7 coexpression, karyotype, FLT3-ITD mutation.

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