With regard to Ki67 expression, the results of the present study are consistent with those of previous studies and showed both a higher number of positive cases and a higher number of positive cells in SEMs compared to SCTs and an even lower number in LCTs [37, 52].Moreover, it has been demonstrated that, although it was weakest in LCTs, a positive correlation between the expression of POSTN and PDPN and the Ki67 antigen was present in all types of testicular tumours studied. The gene discussed is MKI67; the disease is neoplasm of testis.