Comparison of protein expression in normal colonic mucosa, primary colorectal cancer and lymph node metastasis.

Evaluation of normal colonic epithelium versus primary tumour samples for immunoreactivity (Mann-Whitney U test, ↑ = increased in tumour, ↓ = decreased in tumour, - = no change between tumour and normal) and evaluation of primary Dukes C colorectal tumour samples and their corresponding metastasis samples for immunoreactivity (Wilcoxon signed rank sum test, ↑ = increased in lymph node metastasis, ↓ = decreased in lymph node metastasis, - = no change between primary and metastatic tumour).