Ligand‐receptor pairs (CLDN3‐CLDN3, CLDN11‐CLDN11, and PPIA‐BSG) associated with ECM‐related cell types (X3, X4) and cancer‐related cell types (X0, X1, and X2) within these pathways were identified and visualized (Figure 6k,l). The gene discussed is BSG; the disease is cancer.