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A middle-aged man was referred to assess the feasibility of endoscopic removal of a 35 mm laterally spreading lesion within the sigmoid colon. The referring endoscopist appreciated a central depression (0–IIc Paris morphology) and raised the concern for submucosal invasive cancer.
Using an Olympus 190 series high-definition colonoscope (Olympus, Tokyo, Japan), the lesion was carefully examined under white light and narrow-band imaging (NBI) (figure 1A). The central aspect of the …
Contributors Drafting of the article: NS; critical revision of the article for important intellectual content: MS, IB-Y and MJB; final approval of the article: MJB.
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.
Patient consent for publication Not required.