Spatial transcriptomic data showed that co-expression levels of MIF-CD74 and CXCR4-MIF/CD74 were positively correlated in undifferentiated pleomorphic sarcoma, whereas the correlation was low in leiomyosarcoma (Fig. 7G, H; Fig. S4D). The gene discussed is CD74; the disease is undifferentiated pleomorphic sarcoma.