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Near focus with narrow band imaging is used for marking the tumor margin.

After indigo carmine was sprayed over the lesion, marking is performed.

Near focus with narrow band imaging

Near-focus with narrow-band imaging is a novel technique to improve the quality of images of the irregular mucosal structures and microvessels of gastric neoplasms. The investigators compare this technique with indio carmin spray, commonly used tool to determine tumor margin. The subject are patients who underwent endoscopic submucosal dissection for gastric neoplasms. Participants are randomized into near-focus with narrow-band imaging and indigo carmin groups. First, marking is performed at the tumor margins determined by each modality. The distance from the marking dots to the tumor margin is measured histopathologically in the resected specimens. Finally, the investigators will compare the accuracy between two groups based on the distance from marking dots to tumor margin measured by histopathologic examination.

Usefulness of Near-focus With Narrow-band Imaging

Usefulness of Near-focus With Narrow-band Imaging for Determining Gastric Tumor Margin

Marking was diagnosed as accurate if the distance (between margin dots and tumor margin measured by histopathology) was less than 1 mm

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Usefulness of Near-focus With Narrow-band Imaging	NCT02661945	Gastric Tumors	Near focus with...	19 Years -	Kyunghee University Medical Center
Usefulness of Near-focus With Narrow-band Imaging	NCT02661945	Gastric Tumors	Near focus with...	19 Years -	Kyunghee University Medical Center

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