Endoscopic submucosal dissection of a gigantic gastric polyp aided by a novel retraction device and complicated by upper esophageal sphincter laceration during retrieval by Michael Lajin, MD, Fateh Bazerbachi, MD, Octavio Armas, MD

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Endoscopic submucosal dissection to treat squamous cell carcinoma in situ of the anal canal by Michael Lajin, MD, Mohamed O. Othman, MD, Rokay Kamyar, MD, Octavio Armas, MD

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