Table 3.
Term | Definition |
1 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 |
Nonpolypoid | Lesion with little (< 2.5 mm) or no protrusion above the mucosa |
Superficially elevated | Lesion with protrusion but < 2.5 mm above the lumen (less than the 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 |
2 Invisible dysplasia | Dysplasia identified on random (non-targeted) biopsies of colon mucosa without a visible lesion |
Terminology for reporting findings[23].