Classification of polyps/adenomas of the colon (colonic polyps/colonadenomas) according to the WHO classification:
- Non-neoplastic polyp
- Neoplastic epithelial polyp
- Adenoma with the forms:
- Tubular adenoma
- Tubulo-villous adenoma
- Villous adenoma
- Adenoma with high-grade dysplasia (precancerous/precancerous).
- Adenoma with carcinoma
- Other neoplastic polyps
Colonic polyps
Neoplastic polyps | Non-neoplastic polyps | Submucosal lesions |
Benign adenoma | Hyperplastic polyp | Lipoma |
Tubular adenoma | Juvenile polyp | Neuroendocrine tumor |
Tubolovillous adenoma | Peutz-Jeghers polyp | Colonic metastasis |
Villous adenoma | Inflammatory polyp | Colitis cystica profunda |
Carcinoma in situ | Pneumatosis cystoides | |
Intramocosal carcinoma | ||
Invasive carcinoma |
Endoscopic classification of gastrointestinal polyps according to the Paris classification.
Type | Description | Special features |
I | polypoid shape | |
Ip | stalked | |
Is | sessile | |
II | flat lesion (flat) | < twice the height of adjacent normal mucosa/mucosa (8-2% of all polyps) |
IIa | flat-elevated | |
IIb | flat-flat | |
IIc | flat-depressed |
|
III | exulcerated, excavated lesion |
Vienna classification of gastrointestinal epithelial neoplasms.
Category | Description | Therapy |
1 | No neoplasia (new growth) | None |
2 | “Indefinite” for neoplasia | Follow-up |
3 | Low-grade neoplasia of the mucosa (low-grade adenoma/dysplasia). | Follow-up/local therapy |
4 | High grade neoplasia of mucosa | Local therapy |
4.1. | High-grade adenoma/dysplasia | Local therapy |
4.2. | Non-invasive carcinoma (carcinoma in situ). | Local therapy |
4.3. | Intramucosal carcinoma | Local therapy |
5 | Submucosal invasive carcinoma (carcinoma with invasion of the mucosa or deeper) | Local/surgical therapy |