PTGIS and colon adenocarcinoma: Besides, PIK3CG was expressed in B cells, while GGT5 and PTGIS were both expressed in stromal cells, and the expression levels of PIK3CG, GGT5 and PTGIS were validated in single cell data; however, the underlying mechanism of PIK3CG, GGT5 and PTGIS contributing to heterogeneity of COAD remains unclarified.