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060 [Click to watch] Mucosal imaging for polyps in 10 minutes – all you need to know

Professor Yasushi Sano

3 June 2023

Lower GI Diagnostic

ENDOSCOPY QUIZ

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NBI Principle and Application

A large polyp in the ascending colon

What is the most likely diagnosis of this polyp?

  • Hyperplastic polyp

  • Sessile serrated lesion

  • Tubulovillous adenoma

  • Superficial submucosal carcinoma with submucosal invasion depth < 1,000 μm

  • Deep submucosal cancer with submucosal invasion depth > 1,000 μm

Select Answer

Image and content courtesy | Prof Jeong-Sik Byeon

A case suspicious for carcinoma should be resected en bloc with EMR or ESD with enough submucosal layer. Because such a lesion has the potential to invade into submucosal layer. To get the precise histopathologic diagnosis including submucosal invasion or not, polypectomy should not be conducted. Polypectomy can not obtain enough submucosal tissue for pathologic diagnosis.

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Office Bearers

    Chairman

    Yasushi SANO

    Japan

    Vice-Chairman

    Noriya UEDO

    Japan

    Secretary

    Philip CHIU

    Hong Kong

    Treasurer

    James LAU

    Hong Kong