The following variables were evaluated as potential prognostic markers: age (above vs. below median), IGCCCG (good vs. intermediate vs. poor), localization of the primary tumor (extragonadal vs. gonadal), histology (seminoma vs. non-seminoma) and stem cell apheresis outcome (≥8*106 CD34+ cells/kg vs. <8*106 CD34+ cells/kg). Here, CD34 is linked to seminoma.