Pancytopenia is a major risk association with which condition?

• A. Myelodysplastic syndrome
• B. Aplastic anemia
• C. Chronic leukemia
• D. Thalassemia

Answer: (A)

Pancytopenia happens when the bone marrow cannot produce enough of all three blood cell lines. Myelodysplastic syndrome fits this pattern because it is a clonal stem cell disorder with ineffective, dysplastic hematopoiesis across multiple lineages. This leads to low red cells, low white cells, and low platelets, producing the characteristic pancytopenia. Clinically, patients often have fatigue from anemia, increased infections from neutropenia, and bleeding tendencies from thrombocytopenia. The marrow in myelodysplastic syndrome is typically dysplastic and may show cytogenetic abnormalities, reflecting the abnormal hematopoiesis. While other conditions can cause pancytopenia, myelodysplastic syndrome is the classic setting where pancytopenia arises from widespread marrow dysfunction and dysplasia.