Inclusion Criteria:

1. Histological confirmation of gastric IM or dysplasia.

2. The lesion is no larger than 5 cm in diameter.

3. Age ≥ 18 years.

4. No previous endoscopic mucosal resection or submucosal dissection.

5. No active H. pylori infection.

6. Subject is able to tolerate endoscopy and sedation.

7. Subject agrees to participate, fully understands content of the informed consent, and
signs the informed consent form.

Exclusion Criteria:

1. Gastric cancer (intra-mucosal cancer or worse).

2. Prior gastric irradiation or surgery.

3. Anti-platelet or anti-thrombotic medication use that cannot be stopped for 7 days
before and after RFA.

4. Gastric ulcers, fistulae and varices.

5. History of alcohol and/or controlled substance dependency.

6. Pregnancy.