DDAH2 and neoplasm: In turn, DDAH2 in tumors was positively correlated with all genes, while in adjacent tissue, there was no correlation with ARG1 and NOS2. The expression of PRMT5 in tumors correlated with NOS2 but not ARG1, while in adjacent tissue, with ARG1 but not NOS2. The expression of PRMT1 in tumors did not correlate with ODC1, while the association was present in tumor-adjacent tissue.