NOS2 and neoplasm: Tumor expression of NOS2 was insignificantly (ρ = −0.35, p = 0.072) and these of PRMT2 (ρ = −0.41, p = 0.036) and ASL (ρ = −0.41, p = 0.029) were significantly inversely correlated with depth of tumor invasion (T1/2–T3–T4).