Abstract:

Aim: Advanced histological features, polyp size, and polyp count are factors known to increase the risk of adenomatous polyps’ transformation into a malignancy. We aimed to analyze, in detail, the advanced histological features of a large number of polyps that are under the size of 1 cm, which we have identified, and to compare our findings with those of similar studies in literature. Method: A total of 2,302 colonoscopy procedures that were performed for any reason in adult patients above the age of 18 years in our endoscopy unit of the department of gastroenterology between October 2016 and January 2020 were screened. The endoscopic and histological features of the identified procedures were analyzed retrospectively. Results: In 401 (17.42%) of the 2,302 colonoscopy procedures, at least one polyp had been identified. Diminutive polyps (67.21%), small polyps (25.91%), and large polyps (6.88%) were detected. The most common histological diagnosis in the polyps was adenomas (61.13%) and, among all adenomas, tubular adenoma (88.08%) was the most frequent type. Low-grade and high-grade dysplasia was detected in 58.91% and 2.63% of the polyps, respectively. Advanced histological features were detected in 2.41% of the diminutive polyps, 13.28% of the small polyps, and 47.06% of the large polyps. As the polyp size increased, the frequency of the advanced histological features also increased. Conclusion: The number of diminutive polyps and small polyps as well as the frequency of advanced histological features in our study were slightly higher when compared to those in similar studies.

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