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Published on: November 10, 2023
Dysmyelopoietic Features and Bone Marrow Histology in 30 Cases of Primary Myelodysplastic Syndromes
1a Department of Hematology, Postgraduate Institute of Medical Education & Research, Chandigarh, India, 160012.
Abstract:
Thirty cases of primary myelodysplastic syndromes (MDS) were diagnosed according to the FAB criteria. The age ranged between 5-78 years, the median age being 38 years. Twelve (40%) patients were younger than 30 years of age. Male female ratio was 2:1. Nine cases each were diagnosed as refractory anaemia (RA) and refractory anaemia with excess of blasts (RAEB) whereas 12 were diagnosed as RAEB in transformation (RAEB-T). Significantly more RA and RAEB-T cases showed dyserythropoietic features when compared to RAEB. The frequency of dysgranulopoiesis and dysmegakaryopoiesis was similar in all 3 FAB subgroups. Abnormal localisation of immature precursors (ALIP) was present in only 36.6% of the patients and was seen in 58.3% of RAEB-T. When present it appeared to indicate a worse prognosis. Six of the 12 cases showing this finding progressed either to acute myeloblastic leukemia or from RA to RAEB or RAEB-T.
Insights
Myelodysplastic syndromes (MDS) show varied FAB classifications, with abnormal localization of immature precursors (ALIP) indicating a worse prognosis and potential progression to acute myeloid leukemia.
Area of Science:
- Hematology
- Oncology
- Pathology
Background:
- Myelodysplastic syndromes (MDS) are a group of clonal hematopoietic stem cell disorders.
- Accurate classification and prognostic indicators are crucial for managing MDS.
- The French-American-British (FAB) classification system categorizes MDS subtypes.
Purpose of the Study:
- To analyze the characteristics of primary myelodysplastic syndromes (MDS) based on FAB criteria.
- To investigate the prevalence and prognostic significance of specific morphological features, including abnormal localization of immature precursors (ALIP).
- To evaluate the progression patterns in relation to FAB subtypes and ALIP.
Main Methods:
- Retrospective analysis of 30 primary MDS cases diagnosed using FAB criteria.
- Evaluation of morphological features: dyserythropoiesis, dysgranulopoiesis, dysmegakaryopoiesis, and ALIP.
- Correlation of findings with FAB subtypes (Refractory Anemia (RA), Refractory Anemia with Excess of Blasts (RAEB), RAEB in Transformation (RAEB-T)) and patient outcomes.
Main Results:
- The study included 30 patients with a median age of 38 years; 40% were under 30.
- Dyserythropoietic features were significantly more common in RA and RAEB-T compared to RAEB.
- ALIP was present in 36.6% of patients, notably higher (58.3%) in RAEB-T, and associated with a worse prognosis, including progression to acute myeloid leukemia.
Conclusions:
- FAB classification provides a framework for categorizing MDS, with distinct morphological features across subtypes.
- The presence of ALIP is a significant indicator of poor prognosis in MDS patients.
- ALIP may predict disease progression, highlighting its importance in risk stratification and treatment planning for MDS.
