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Pathological features of malignant colorectal polyps: a five-year descriptive retrospective study
Tarathep Wongsuriyathai1, Wiyada Dankai2, Sarawut Kongkarnka2
1Medical Student, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
Przeglad Gastroenterologiczny
|December 31, 2025
Summary
Malignant colorectal polyps, often adenocarcinomas, are increasingly recognized. Deeper Haggitt invasion levels correlate with higher risks of lymphatic and perineural invasion, particularly in the rectosigmoid colon.
Area of Science:
- Gastroenterology
- Colorectal Surgery
- Pathology
Background:
- Malignant polyps, adenocarcinomas from adenomatous polyps, can metastasize.
- Knowledge gaps exist regarding malignant colorectal polyp histopathology.
- These polyps are increasing in prominence.
Purpose of the Study:
- Describe demographic and pathological features of malignant polyps.
- Investigate the correlation between Haggitt level and clinicopathological parameters.
Main Methods:
- Retrospective study of patients diagnosed with adenocarcinoma from adenomatous polyps.
- Data collected between January 2018 and December 2022.
- Correlation analysis using the chi-squared test.
Main Results:
- Study included 53 patients (2:1 male-to-female ratio, mean age 66).
- Malignant polyps predominantly found in the sigmoid colon and rectum.
- Deeper Haggitt invasion levels correlated with lymphatic and perineural invasion.
Conclusions:
- The rectosigmoid colon is a common site for malignant polyps.
- Increased Haggitt invasion depth elevates the risk of metastasis via lymphatic and perineural channels.
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