11.   Two patients who had been negative for dysplasia were found to have low grade dysplasia in their colectomy specimens.

12.   If high grade dysplasia or arcinoma is detected the patient can be treated at an early stage.

13.   It can be argued that the finding of high grade dysplasia without cancer should be considered to be a success of surveillance.

14.   The diagnosis of dysplasia is beset with problems, as discussed above, furthermore the significance and outcome of high grade dysplasia is unpredictable.

15.   Low grade dysplasia was a common finding in ulcerative colitis surveillance in our study and in others and has little prognostic significance.