Increased circulating metamyelocyte count

What it means

The number of metamyelocytes in the peripheral blood circulation is above the upper limit of normal. Metamyelocytes are immature neutrophils with a size of 10-18 micrometers, an indented or kidney-shaped nucleus, pinkish-blue staining cytoplasm with secondary granules, and a nucleus:cytoplasm ratio of 1.5:1.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category