Human podoplanin (hPDPN) is expressed in many cancers, including malignant gliomas, lung cancers, esophageal cancers, malignant mesotheliomas, testicular cancers, bladder cancers, and osteosarcomas 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and the expression of hPDPN in cancer‐associated fibroblasts contributes to poor prognosis 14, 15, 16, 17, 18, 19. The gene discussed is PDPN; the disease is osteosarcoma.