The CD DEGs related to exosomes include several membrane receptors that might be expressed in CD cells (P2RY1, ABCB1, CHP1, PTPRF, FZD5, LPAR5, SFXN1) after being delivered by exosomes, which might be involved in the interaction with microorganisms, and the regulation of citrate cycle (TCA cycle), metabolic pathways, and pathways in cancer. Here, PTPRF is linked to cancer.