| Type | Frequency |
| Benign polyps | |
| Cholesterol polyps | 60% |
| Adenomyomas | 25% |
| Inflammatory polyps | 10% |
| Adenomas | 4% |
| Miscellaneous: | 1% |
| Leiomyomas | |
| Fibromas | |
| Lipomas, etc | |
| Malignant polyps | |
| Adenocarcinoma | 80% |
| Miscellaneous: | 20% |
| Mucinous cystadenomas | |
| Squamous cell carcinoma | |
| Adenoacanthomas | |
