To characterize angiogenesis activity in tumor tissues, six angiogenesis‐related factors were evaluated: HALLMARK angiogenesis signature, WP angiogenesis signature, BIOCARTA VEGF pathway, WP VEGFA‐VEGFR2 signaling, endothelial cell abundance from the EPIC algorithm,[22] and endothelial cell abundance from the xCell algorithm.[23] Correlation analysis demonstrated significant positive relationships between the collagen score and these angiogenesis signatures (Figure 2d). Here, KDR is linked to neoplasm.