PDPN and malignant pleural mesothelioma: Consistent with previous reports, podoplanin expression was detected in bladder SCC cell line UM-UC-526 and malignant pleural mesothelioma cell line NCI-H226 (referred to as H226 from hereon)21, but not in lung adenocarcinoma cell line A54940 (Fig. 1a, Supplementary Fig. S1).