Absolute Promyelocytes
What It Means
The number of very early white cell precursors, typically confined to the bone marrow.
Why It Matters
When present in blood, promyelocytes show that the production line is being used aggressively, often in response to major internal demands.
Why It Matters
Best understood in the context of the full differential, smear comments, and specialist review, as this marker is a high-level signal of marrow activation rather than a day-to-day wellness metric.