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reasons. Although they are considered a benign lesion, all symptomatic polyps should be removed for a more reliable
histological diagnosis, resolution of symptoms and to prevent potential malignant transformation. In fact, there are
no significant difference between pure gastric hyperplastic polyps and gastric hyperplastic polyps with neoplastic transformation
in the number, location, or gross appearance of polyps. If symptomatic, patients usually complain of dyspepsia,
heartburn, abdominal pain or upper gastrointestinal bleeding leading to anaemia. Complete or incomplete gastric outlet
obstruction with intermittent symptoms, may rarely be caused by gastric hyperplastic polyps. We described the management
of a rare case of intermittent gastric outlet obstruction caused by a large hyperplastic antral polyp prolapsing through
the pylorus. Using hydroxypropylmethylcellulose, a new lifting agent, firstly from pyloric side, we obtained a reliable longlasting
submucosal cushion under the lesion which allowed a stable repositioning of the polyp in the gastric lumen without
making additional infiltration during the endoscopic mucosal resection.
Innovative lifting agents could significantly reduce the procedure time, but additional studies should be performed on
this area to confirm preliminary results. Endoscopic mucosal resection not only provides tissue to determine the exact
histopathologic type of the polyp, but also achieves symptomatic treatment.