Abstract
Purpose
Multicolor flow cytometry (MFC) is widely available, fast and has an easy-to perform approach for finding neuroblastoma (NB) cells among normal bone marrow (BM) hematopoietic cells. Aim of the study was to investigate prognostic significance of initial MFC tumor cells’ detection in BM of children with NB.
Methods
51 patients (24 boys and 27 girls) aged from 6 days to 15 years (median age 1 year 3 months) with NB were included in the study. BM samples at the time of diagnosis were obtained from 2 to 5 aspiration sites per patient. CD45(−)CD56(+)CD81(+)GD2(+)-cells were evaluated by MFC.
Results
NB cells were detected in BM by FC more frequently compared to conventional cytomorphology (49.0% and 29.4% patients, respectively, р = 0.043). Patients with NB cells detected in BM by MFC had significantly worse event-free survival and cumulative incidence of relapse/progression [0.24(0.08) and 0.60(0.10), respectively] compared to children with negative result of immunophenotyping [0.85(0.07) and 0.12(0.06), respectively, p < 0.001 in both cases]. BM involvement detection by MFC maintained its prognostic significance in various patients groups. In multivariate analysis, immunophenotyping proved to be an independent prognostic factor when analyzed jointly with other NB risk factors. In 42 patients BM involvement was also studied by RQ-PCR for PHOX2B and TH genes expression. Within groups of patients divided by RQ-PCR positivity, MFC-positivity retained prognostic significance.
Conclusions
Thus flow cytometric BM involvement detection has very strong prognostic impact even stronger than RQ-PCR. It could be used in combination with other parameters for the treatment strategy choice in patients with NB.
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Popov, A., Druy, A., Shorikov, E. et al. Prognostic value of initial bone marrow disease detection by multiparameter flow cytometry in children with neuroblastoma. J Cancer Res Clin Oncol 145, 535–542 (2019). https://doi.org/10.1007/s00432-018-02831-w
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DOI: https://doi.org/10.1007/s00432-018-02831-w