Objective To explore the correlation between the expression of somatostatin (SS), gastrin (GAS), apoptosis index (AI),and p53 gene in colonic carcinoma. Methods The expression of GAS, SS, p53 and apoptosis cell were detected by immunohistochemistry (streptavidin-biotin-pero xidase complex, SABC) and in situ apoptosis detecting technic (TUNEL) . Results AI is higher in SS high and middle expression cases than in low expression cases(q=5.06,q=3.95,P