Ülseratif kolitli hastalarda displazi varlığı ve displastik mukozada p53 ve Ki-67 ekspresyonu

Background and Aims:The risk of developing colorectal cancer increases distinctly for more than 8-10 years from the onset of ulcerative colitis. Mortality and morbidity in patients with ulcerative colitis can be decreased with colonoscopic screening methods. The aim of this study was to investigate the presence of dysplasia histopathologically in patients with ulcerative colitis and to determine p53 and Ki-67 expression rates in dysplastic mucosa using immunohistochemical techniques. Materials and Methods: Fifty-two ulcerative colitis patients who were followed clinically while in remission were enrolled into the study. Total colonoscopy was applied to every patient. Biopsies were taken from the colon and rectum every 10 cm. Presence of dysplasia was detected histopathologically in the biopsy samples, and p53 and Ki-67 expression was investigated immunohistochemically in dysplastic samples. Results: The duration of disease was 8 years. On immunohistochemical examination, positive staining for p53 was detected in 6 patients and positive Ki-67 staining in 3 patients. Conclusions: Dysplasia was found at a higher rate in patients with disease duration >8 years and pancolitis. In our study, the presence of dysplasia in patients with disease duration of