The SCENIC consensus for the nomenclature of dysplasia in inflammatory bowel disease using the Paris classification, with modifications to describe ulceration and the borders of the lesion14
| Term | Definition |
| Visible dysplasia | Dysplasia identified on targeted biopsies from a lesion visualised at colonoscopy |
| Polypoid | Lesion protruding from the mucosa into the lumen ≥2.5 mm |
| Pedunculated | Lesion attached to the mucosa by a stalk |
| Sessile | Lesion not attached to the mucosa by a stalk: entire base is contiguous with the mucosa |
| Non-polypoid | Lesion with little (<2.5 mm) or no protrusion above the mucosa |
| Superficial elevated | Lesion with protrusion but <2.5 mm above the lumen (<height of the closed cup of a biopsy forceps) |
| Flat | Lesion without protrusion above the mucosa |
| Depressed | Lesion with at least a portion depressed below the level of the mucosa |
| General descriptors | |
| Ulcerated | Ulceration (fibrinous-appearing base with depth) within the lesion |
| Border | |
| Distinct border | Lesion’s border is discrete and can be distinguished from surrounding mucosa |
| Indistinct border | Lesion’s border is not discrete and cannot be distinguished from surrounding mucosa |
| Invisible dysplasia | Dysplasia identified on random (non-targeted) biopsies of colon mucosa without a visible lesion |