AFP and seminoma: Serum AFP and β-HCG levels were markedly elevated in non-seminoma patients (AFP: 87.24 ± 28.29 ng/mL vs. 2.58 ± 0.27 ng/mL; β-HCG: 81.45 ± 31 IU/L vs. 2.55 ± 0.76 IU/L, p < 0.01 for both).