Consistent with the more favorable outcomes observed in this group of patients, GNB patients, especially those with the intermixed subtype of tumor, more frequently had normal serum ferritin levels (88.0% vs. 60.0% vs.40.0%, P<0.001), LDH (15.0% vs. 10.0% vs. 3.0%, P=0.025) and NSE (19.0% vs. 7.0% vs. 4.0%, P=0.013) when compared with NB patients. This evidence concerns the gene ENO2 and neoplasm.