EFO_0004506 (monocyte early outgrowth colony forming unit) can be described as follows. A monocyte early outgrowth colony forming unit measurement is the result of a cell culture assay in which monocytes are plated on fibronectin plates and morphology and growth assessed in an assay which correlates circulating cells and vascular function. The output of the assay is a measure of how many colonies were formed, at what point and their morphology. Also known as: early outgrowth endothelial progenitor cell colony forming units, monocyte early outgrowth colony forming units.