RESUMEN
Lower gastrointestinal (GI) bleeding with different causes was studied with fiberoptic coloscopy in 022 patients,and the endoscopic features were discussed.Of the 922 cases,colonic polyps were identified in 354 cases (38.4%),and neoplastic polyps in 10 (5.36%).in which villous adenomas was the most common,accounting for 47%.Large intestinal cancers were diagnosed in 134 cases (14.5%) and inflammatory bowel disease in 50 cases (5.4%).The etiology of the bleeding also included infectious diseases in colon,such as tuberculosis,amebiasis,schistosomiasis,idiopathic solitary colonic ulcer.Rarer causes of the lower GI hemorrhage included di-verticulum,hemangioma and trichuriasis.
RESUMEN
The expression of human epidermal growth factor (hEGF) and hEGF receptor (hEGF-R) was examined by 125I-labeled-hEGF binding analysis in 21 cases of colonic carcinomas. No significant difference was found in the values of hEGF binding among carcinoma, paracarcino-ma regions and regions far away from carcinoma, but the values in all of them were higher than that in normal colonic tissues (P