ELFN1 and cancer: ESTIMATE analysis showed that ELFN1 expression was significantly positively correlated with immune and stromal scores in cancers such as BLCA, BRCA, COAD, KICH, OV, PAAD, PCPG, PRAD, READ, and UVM, while it was negatively correlated in GBM, KIRP, and LGG (Figure 6A).