Operative endoscopy from the point of view of the surgeon.
D004724:Endoscopy; D004938:Esophageal Neoplasms / Q000150:complications; D004940:Esophageal Stenosis / Q000209:etiology / Q000628:therapy*; D042882:Gallstones / Q000601:surgery*; D006801:Humans; D011127:Polyps / Q000601:surgery*; D013274:Stomach Neoplasms / Q000601:surgery*