What is the immature granulocyte (IG) fraction on an automated cell counter?

By William Aird

The IG fraction includes promyelocytes, myelocytes, and metamyelocytes. Bands and blasts are not included. The Sysmex XE-2100 Automated Hematology System (Sysmex America, Inc, Lincolnshire, IL, USA), for example, uses light scattering and fluorescence to identify granulocytes with a larger nuclear volume, consistent with immature cells.

Learn more here.