Abstract

The myelodysplastic syndromes (MDS) are a group of disorders characterized by peripheral pancytopenia despite normo- or hyper-cellular bone marrow. This is thought to be due to apoptosis of hematopoietic bone marrow cells, resulting in ineffective hematopoiesis. Several studies have confirmed the presence of a high apoptotic rate and proliferative state in the bone marrow of MDS. However, MDS is a heterogeneous disease from the point of view of prognosis. Some patients develop only anemia and show long survival with or without maintenance therapy, while others develop fatal pancytopenia or leukemic changes and therefore show a poor prognosis. This review focuses on the relationship between prognosis and apoptotic or proliferative processes affecting hematopoietic cells in the bone marrow of patients with MDS.

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