Correlation between the expression levels of NNMT and MMP-2 in ccRCC tissues. (a) Expression levels of NNMT and MMP-2 in 33 ccRCC tissues were dotted by using the values, and the correlation between the expression of NNMT and MMP-2 was analyzed by the Pearson correlation method . (b) Immunohistochemistry analysis was used to detect NNMT and MMP-2 in ccRCC tissue sections. The representative cases with a positive (case 1) or negative (case 2) immunostaining of NNMT and MMP-2 are shown. Arrow indicates the cytoplasm immunostaining of NNMT and MMP-2. Photos were taken under 100x magnification.