| colonic adenoma | 0.33 | Colonic adenomas were found in four cases. | ||
| tubular adenoma | 0.33 | As for specific premalignant lesions, tubular adenoma in one patient harboured cancer in this study. | ||
| large adenoma | 0.26 | Total colectomy was performed because of incomplete removal of a large tubular adenoma with intra-epithelial malignant change. | ||
| small adenoma | 0.26 | Angiodysplasia of the caecum was found in one patient who also had a small adenoma. | ||
| villous adenoma | 0.26 | In areas of villous adenoma some of the tumour cells also showed nuclear immunoreactivity. |