PMC6297263_01
Colonoscopic view of 4.5-cm polyp-like mass located in the sigmoid colon.
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fig1
The patient was referred to a gastroenterologist who performed a colonoscopy, which found a large polyp-like lesion of 4.5 cm in the sigmoid colon that, upon biopsy, a foci of well-differentiated adenocarcinoma with high-grade dysplasia of 1.5 cm was diagnosed (Fig 1).