Possible factors correlating with higher SOD levels on the 7th postoperative day were tumor grade 0, T1, higher levels of CRP, and receiving opioids (tramadol) on the 1st postoperative day, while CRP on the 1st postoperative day remained significantly correlated with higher levels of SOD levels on the 7th postoperative day (B = 40.510, 95%CI B = 23.73–57.29, p < 0.001). The gene discussed is CRP; the disease is neoplasm.