Table 1: Baseline characteristics of the patients.

NoAgeAnn Arbor stageIPI scoreECOG performance statusSiteNodal involvementExnodal involvementKi-67β2 microglobulin (mg/L)LDH (IU/L)Treatment

137IVB30BilateralPara-aortic lymph nodeBilateral kidney, perirenal region, and spleen80%2.33237Orchiectomy, CT, and prophylactic intrathecal injection
273IVB30RightAbdominal lymph nodeLung and nasopharyngeal wall40%2.63177Orchiectomy, CT, RT, and prophylactic intrathecal injection
357IVB31LeftNeck lymph nodeMaxillary sinus, maxillary bone, orbital cavity, temporalis, multiple subcutaneous tissue, and bone of trunk60%2.82301Orchiectomy and CT
458IEA10LeftN/AN/A223Orchiectomy, CT, and RT
573IVA30BilateralCervical lymph nodes and hilar lymph nodeSkin50%2.19246Orchiectomy, CT, and prophylactic intrathecal injection
658IVB30LeftMultiple lymph nodesKidney, adrenal gland, and spermatic cord90%NA367Orchiectomy and CT + prophylactic intrathecal injection

IPI, International Prognostic Index; NCCN IPI, National Comprehensive Cancer Network International Prognostic Index; ECOG performance status, Eastern Cooperative Oncology Group performance status; LDH, lactic dehydrogenase; CT, chemotherapy; RT, radiotherapy; N/A, not applicable.