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WHO Classification of Tumours
Refractory anaemia
Tumours of haematopoietic and lymphoid tissues


Definition

Refractory anaemia (RA) is the most common variant of refractory cytopenia with unilineage dysplasia. The dysplasia is generally confined to the erythroid lineage and affects 10% or more of the erythroid precursors. Blasts are rarely seen in the blood and are always <1% of the white blood cells and less than 5% of the nucleated bone marrow cells. It is associated with refractory anemia and rarely bicytopenia.

> Related Topics
Overview: Refractory cytopenia with unilineage dysplasia
Overview: Myelodysplastic syndromes/neoplasms
Introduction: Myeloid Neoplasms