Haemostatic Gel Prophylaxis for Post Duodenal Endoscopic Resection Bleeding

Inclusion Criteria: Ampullary lesions * Single ampullary lesion ≥ 10mm * Resection via hot ampullectomy, injection/Endoscopic mucosal resection of adjacent lateral spreading component Duodenal Lesions * ≤ 2 lesions * Lesion ≥15mm * Resection via hot Endoscopic mucosal resection * Morphology: 0-Is, 0-IIa/b/c or combination, submucosal lesions Exclusion Criteria: * Inability to provide informed consent (including people with cognitive impairment); * Pregnant or breastfeeding women; * Allergy to PuraStat®; * "Cold" mucosal endoscopic resection; * Patient under guardianship or curatorship, or under a regime of deprivation of liberty; * Participating patient, or in a period of exclusion from another clinical trial; * Patient not benefiting from a social security scheme.