Removal of superficial lesions or early cancers from the GI mucosa by injecting fluid beneath the lesion, then snaring it.

Why it’s done
• Large or sessile polyps
• Early-stage mucosal cancers

Preparation
• Bowel prep or fasting depending on location
• Adjust blood thinners as advised

Procedure
• Sedation; lesion lifted with solution injection
• Snare resection and cautery
• Duration: 20–60 minutes

Afterwards
• Recovery for 1–2 hours
• Liquid diet then soft foods over 1–2 days

Risks
• Bleeding (1–5%)
• Perforation (<1%)