Malignancy in large colorectal lesions.

Context: The size of colorectal lesions, besides a risk factor for malignancy, is a predictor for deeper invasion objectives: To evaluate the malignancy of colorectal lesions ≥20 mm.

Methods: Between 2007 and 2011, 76 neoplasms ≥20 mm in 70 patients were analyzed.

Results: The mean age of the patients was 67.

Prevalence of non-polypoid colorectal neoplasms in southern Brazil.

Background And Aim: Several studies suggest that non-polypoid lesions (NPL) show higher aggressiveness than polypoid lesions, particularly depressed lesions. The present study aimed to assess the prevalence of NPL and the presence of advanced histology in a Brazilian population.

Methods: Two thousand and sixty-seven superficial neoplastic lesions diagnosed in 1135 patients were analyzed.