CD33 and gastric cancer: Here, our data confirms CD163 in gastric cancer has a positive correlation with Tregs (CD4, CD25 and FOXP3), MDSCs (CD33, CD11b and CD14) and Cafs (FAP), indicating CD163 level is an potential index to monitor the status of tumor associated macrophages, Tregs, MDSCs and Cafs in gastric cancer.