Figure 1. Common phenotypic markers of MDSCs and TAMs.

Several phenotypic markers of mouse and human MDSCs (A) and TAMs (B) have been identified (+ indicates expression, while – indicates lack of expression) and used to define specific cell subgroups, such as PMN-MDSCs, MO-MDSCs, and immature MDSCs (I-MDSCs), as well as M1-like and M2-like TAMs, by both cytofluorimetric and immunohistochemical analyses.