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Haematological abnormalities in Shwachman-Diamond syndrome
O P Smith1, I M Hann, J M Chessells
1Department of Haematology, Great Ormond Street Hospital for Children NHS Trust, London.
British Journal of Haematology
|August 1, 1996
Summary
Shwachman-Diamond syndrome (SDS) patients frequently exhibit neutropenia and elevated fetal hemoglobin. This study reveals a higher-than-expected rate of myelodysplastic syndrome and acute myeloid leukemia transformation in SDS patients.
Area of Science:
- Hematology
- Oncology
- Genetics
Background:
- Shwachman-Diamond syndrome (SDS) is a rare inherited bone marrow failure syndrome.
- Understanding the hematological manifestations and long-term risks of SDS is crucial.
Purpose of the Study:
- To analyze the long-term hematological parameters in SDS patients.
- To determine the incidence of myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) in SDS.
Main Methods:
- Retrospective analysis of 21 SDS patients over 25 years.
- Evaluation of hematological parameters, including neutrophil counts, hemoglobin, and platelet counts.
- Bone marrow examination and cytogenetic analysis in a subset of patients.
Main Results:
- All patients had neutropenia, often intermittent, with impaired chemotaxis.
- Anemia (66%) and thrombocytopenia (24%) were common; elevated fetal hemoglobin (HbF) occurred in 80%.
- MDS developed in 33% of patients, with 24% progressing to AML, often associated with chromosomal abnormalities.
Conclusions:
- SDS carries a significant risk of leukaemic transformation, likely underestimated at 5-10%.
- SDS serves as a critical model for studying leukaemogenesis.
- Further research into SDS pathobiology may offer insights into leukemia development.