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The Austrian biodatabase for chronic myelomonocytic leukemia (ABCMML) : A representative and useful real-life data

Klaus Geissler1,2, Eva Jäger3, Agnes Barna4

  • 1Sigmund Freud University, Vienna, Austria. klaus.geissler@wienkav.at.

Wiener Klinische Wochenschrift
|July 20, 2019
PubMed

Insights

The Austrian biodatabase for chronic myelomonocytic leukemia (ABCMML) captures real-world data, confirming its value for research. This study validates prognostic markers and highlights differences between myeloproliferative and myelodysplastic subtypes of CMML.

Area of Science:

  • Hematology
  • Oncology
  • Genomics
  • Clinical Research

Background:

  • Chronic myelomonocytic leukemia (CMML) is a rare hematologic malignancy with complex biology.
  • Large, comprehensive real-world datasets are crucial for understanding CMML heterogeneity and improving patient outcomes.
  • The Austrian biodatabase for chronic myelomonocytic leukemia (ABCMML) offers a unique combination of clinical, functional, and molecular data.

Purpose of the Study:

  • To assess the representativeness of the ABCMML cohort by comparing its clinicolaboratory characteristics with international CMML cohorts.
  • To validate established prognostic parameters within the ABCMML dataset.
  • To investigate phenotypic and genotypic differences between myeloproliferative (MP) and myelodysplastic (MD) subtypes of CMML.

Main Methods:

  • Retrospective analysis of clinicolaboratory data from 531 CMML patients (excluding those in transformation) within the ABCMML.
  • Comparison of patient characteristics (age, blood counts, LDH, blasts) with published CMML cohorts.
  • Evaluation of established prognostic parameters (leukocytes, hemoglobin, blasts, cytogenetics) for outcome discrimination.
  • Analysis of differences between MP-CMML and MD-CMML, including molecular mutations (e.g., RAS-pathway), in vitro colony growth, and clinical features (e.g., splenomegaly).

Main Results:

  • The ABCMML cohort's median values for key clinicolaboratory parameters align with reported CMML series, indicating representativeness.
  • Established prognostic markers effectively discriminated patient outcomes within the ABCMML cohort.
  • MP-CMML patients exhibited distinct features compared to MD-CMML, including higher blast counts, elevated LDH, RAS-pathway mutations, increased spontaneous myelomonocytic colony growth, and higher incidence of splenomegaly.

Conclusions:

  • The ABCMML is a valuable and representative real-world data source for CMML research.
  • The study confirms the utility of established prognostic parameters in this cohort.
  • Significant clinicolaboratory and molecular differences between MP-CMML and MD-CMML subtypes are confirmed, supporting distinct biological entities.

Keywords:
CFU-GMCMMLIn vitro cultureNGSRAS

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