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Pocket creation method. (A) A colon tumor, such as a laterally spreading tumor. (B) A minimal mucosal incision is performed after submucosal injection. (C, D) The endoscope is inserted into the submucosal layer from the initial incision and submucosal dissection is performed in such a way as to make a pocket under the lesion. (E, F) Finally, incisions are made around the lesion to complete en bloc resection of the remaining mucosa.
