For 1 case with strangulation of colon and 2 cases accidental death, the expressions of p16, p27 and Rb were positive in normal colorectal mucosa, and the expression of cyclinD1 was negative (2 cases) and positive (1 case).

• 对于乙状结肠扭转1例和意外死亡的正常大肠粘膜组织2例pl6、p27和Rb蛋白的表达均呈阳性，而CyClinD； 蛋白的表达2例呈阴性，l例呈阳性。