近年对于大肠腺瘤——癌因果关系的报道逐步增多,有认为所有大肠腺瘤的5%可在5～15年内恶变,因此值得对腺瘤加以进一步研究.本文对14例大肠腺瘤进行了光镜和超微结构观察,以便对这些腺瘤的形态特征更为深入地了解.一、材料与方法本组男13例,女1例,年龄39～72岁.所有患者均无出血史,长期居住在血吸虫病 In recent years, the report of the causal relationship between colorectal adenomas and cancer has gradually increased. It is believed that 5% of all colorectal adenomas can be malignant in 5 to 15 years. Therefore, it is worth further study on adenomas. This article has conducted 14 cases of colorectal adenomas. Light microscopy and ultrastructural observations to better understand the morphological characteristics of these adenomas. I. Materials and Methods There were 13 males and 1 female, aged 39 to 72 years. All patients had no history of bleeding. Long-term living in schistosomiasis