The highest number of cellular communications from type 2 conventional dendritic cells (cDC2) to CD4+Th2 cells was found in CRSwNP, where the ICAM1-CD226 pathway from cDC2 to CD4+Th2 was significantly upregulated in eCRSwNP. The gene discussed is ICAM1; the disease is chronic rhinosinusitis with nasal polyps.