Blasts 50 Percent or More of Bone Marrow Nucleated Cells

**Semantic type:** Laboratory or Test Result

**Definition:** A semi-quantitative microscopic finding indicating that greater than or equal to 50 percent of the nucleated cells in a bone marrow sample are immature mononuclear cells.

**Synonyms:** - Blasts Greater Than 50 Percent of Bone Marrow Nucleated Cells