GSTM1 and neoplasm of testis: Biological investigations demonstrated the following: white blood cell count (WBC) of 7460/mm3, hemoglobin (Hb) of 15.3 g/dL, hematocrit (Ht) of 43.1%, platelet count (Pl) of 237,000/mm3, lactate dehydrogenase (LDH) of 190 U/L, and beta-human chorionic gonadotropin (β-HCG) < 0.10, which is within the normal range and typically elevated in primary testicular tumors.