Advanced technique to remove deeper or larger GI lesions en bloc.

Why it’s done:

  • Early cancers
  • High-grade dysplasia

Preparation:

  • Fasting or bowel prep
  • Stop anticoagulants

What to expect:

  • Sedation or anesthesia
  • Dissection with special knives
  • Takes 1–3 hours

Risks:

  • Bleeding (5–10%)
  • Perforation (3–5%)

Follow-up:

  • Hospital stay 1–2 days
  • Surveillance endoscopy