NOS2 and CD163 expression at the tumor invasive front in relation to clinicopathologic characteristics in CRC.

The following number of missing cases were present in analyses for NOS2 and CD163, respectively: localization, 4 and 5; stage, 10 and 9; grade, 8 and 8; growth pattern, 10 and 9; histology type, 7 and 7; adjuvant chemotherapy, 10 and 11, and preoperative radiation therapy; 4 and 10. Unless otherwise indicated, Fisher's exact test was used for categorical variables.*Exact linear-by-linear association test was used to test for linear relationship between variables.†Preoperative radiation therapy in rectal cancers only.