Gastritis status in gastric pyloric gland adenoma in Baltimore (A) and Bayreuth (B)
| (A) Baltimore | |
| Normal stomach | 12.9% (FAP) |
| Active Helicobacter gastritis | 0% |
| Ex-Helicobacter gastritis | 6.4% |
| Chemical gastritis | 3.3% |
| Autoimmune | 77.4% |
| (B) Bayreuth | |
| Normal stomach | 2.9% (probably FAP) |
| Active Helicobacter gastritis | 14.0% |
| Ex-Helicobacter gastritis | 18.6% |
| Chemical gastritis | 14.0% |
| Autoimmune | 50.6% |
FAP, familial adenomatous polyposis.