Dysplasia and epithelial polyps in gastrointestinal tract

Dysplastic lesions, preceding invasive colonic neoplasm can present as flat or elevated lesions, are relevant due to: - High incidence in daily practice - It is an evolving area with diagnostic criteria frequently modified that result in low reproducibility - It is a critical area for prevention and screening of CRC The main controversial areas are: - In the context of inflammatory bowel disease, and - Grading, subtyping, and staging of polyps