Figure 2A provides a visual comparison of all four glioma (astrocytoma) grades I through IV, and shows that grade IV glioma blood vessels stained heavily for PSMA, while grades II (n = 4) and III (n = 5) exhibited some staining of tumor parenchyma cells but little vessel staining. Here, FOLH1 is linked to astrocytoma (excluding glioblastoma).