Terminal -deoxynucleotidyl transferase mediated nick end labeling( TUNEL)and Immunohistochemists were used to detect the cell apoptosis and expression of PCNA in the tissue of distal ileum.

• 取末端回肠组织,TUNEL法检测粘膜上皮组织细胞的凋亡情况及免疫组化方法检测PCNA表达情况。