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Copyright ©The Author(s) 2015.
World J Gastroenterol. May 7, 2015; 21(17): 5149-5157
Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5149
Table 1 Paris classification of superficial colorectal lesions
Polypoid type1Pedunculated (0-1p)
Sessile (0-1s)
Mixed (0-1sp)
Non-polypoid typeSlightly elevated (0-IIa)
Flat (0-IIb)
Slightly depressed (0-IIc)
Mixed typesElevated and depressed (0-IIa + IIc)
Depressed and elevated (0-IIc + IIa)
Sessile and depressed (0-1s + IIc)
Table 2 Categories of pit pattern at the surface of the colonic mucosa
Non neoplasticI: Normal mucosa
II: Enlarged regular stellar crypts
Neoplastic, adenomatousIIIL: Elongated, sinuous crests
IIIS: Narrowed round and irregular pits
IV: Branched or gyrus-like crests
Neoplastic, cancerVi: Irregular surface
VN: Amorphous surface
Table 3 Categories of vascular pattern at the surface of colonic mucosa
Non neoplasticNormal: Well-delineated capillaries surrounding pits opening
Faint: Poor visibility of capillaries around enlarged pits
Neoplastic, adenomatousNetwork: Vessels organized in a large and regular mesh
Dense: Enlarged vessels of regular size at top of elongated crests
Neoplastic, cancerIrregular: Enlarged vessels of irregular diameter and diverging directions
Sparse: Poor distribution of irregular vessels with diverging directions