Blasts 25 Percent or More of Bone Marrow Nucleated Cells

**Semantic type:** Laboratory or Test Result

**Definition:** A semi-quantitative microscopic finding indicating that 25 percent or more of the nucleated cells in a bone marrow sample are immature mononuclear cells.

**Synonyms:** - Blasts 25% or More of Bone Marrow Nucleated Cells - Blasts Greater than or Equal to 25 Percent of Bone Marrow Nucleated Cells - M3 (greater than 25% blasts)