A 62-year-old Indian male presents with early gastric cancer (differentiated-type, intramucosal, 2.5 cm, no ulceration) detected on screening endoscopy. The procedure marked **C** in the diagram is planned. Which of the following is the PRIMARY ADVANTAGE of this technique over piecemeal endoscopic mucosal resection (EMR) in achieving curative intent for this patient?

Question

Accepted Answer

D. En-bloc resection regardless of lesion size, with higher R0 resection rates and lower local recurrence. ## Why "En-bloc resection regardless of lesion size, with higher R0 resection rates and lower local recurrence" is right

The structure marked **C** (Endoscopic Submucosal Dissection, ESD) is specifically designed to achieve en-bloc resection of early gastrointestinal neoplasms regardless of size, with curative intent. The JGCA 2021 and ESGE 2022 guidelines emphasize that ESD achieves R0 resection rates of ~90% compared to only ~50% for piecemeal EMR, and local recurrence rates of 1–3% versus 15–30% for EMR. This en-bloc capability is the fundamental advantage that enables accurate histologic staging and curativity assessment, making it the gold standard for early gastric cancer meeting appropriate criteria.

## Why each distractor is wrong

- **Shorter procedure time and lower risk of delayed bleeding complications**: ESD actually has LONGER procedure times (90–180 min vs. 15–30 min for EMR) and HIGHER complication rates, including delayed bleeding (4–7% vs. <1% for EMR). This directly contradicts the clinical advantage.
- **Ability to treat lesions with submucosal invasion >500 μm without surgical backup**: ESD is curative only for SM1 invasion (≤500 μm) in differentiated-type cancers ≤3 cm. Deeper submucosal invasion (SM2–SM3) requires surgical gastrectomy with lymphadenectomy, not ESD alone.
- **Lower cost and wider availability in community endoscopy centers across India**: ESD requires significant technical expertise (>30–50 cases learning curve), longer procedure time, and higher cost than EMR. It is not a cost-effective or widely available first-line technique in community settings.

**High-Yield:** ESD enables en-bloc R0 resection for early gastric cancer regardless of size, achieving outcomes equivalent to gastrectomy while preserving organ function and quality of life—the cornerstone of modern endoscopic oncology.

[cite: JGCA Gastric Cancer Treatment Guidelines 2021; ESGE Guidelines 2022]

Answer

A. Lower cost and wider availability in community endoscopy centers across India

Answer

B. Ability to treat lesions with submucosal invasion >500 μm without surgical backup

Answer

C. Shorter procedure time and lower risk of delayed bleeding complications

Explanation

Why "En-bloc resection regardless of lesion size, with higher R0 resection rates and lower local recurrence" is right

Why each distractor is wrong

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