PDPN and seminoma: Normal testes were negative for both POSTN and PDPN, whereas 27 (44.3%) Leydig cell tumours, 54 (84.4%) Sertoli cell tumours and 56 (91.8%) seminomas were cytoplasmically positive for POSTN and 23 (37.7%), 49 (77.6%) and 44 (72.1%) were cytoplasmically positive for PDPN respectively.