Non-polypoid colorectal neoplasms: Classification, therapy and follow-up

Table 3 Categories of vascular pattern at the surface of colonic mucosa

Non neoplastic	Normal: Well-delineated capillaries surrounding pits opening
	Faint: Poor visibility of capillaries around enlarged pits
Neoplastic, adenomatous	Network: Vessels organized in a large and regular mesh
	Dense: Enlarged vessels of regular size at top of elongated crests
Neoplastic, cancer	Irregular: Enlarged vessels of irregular diameter and diverging directions
	Sparse: Poor distribution of irregular vessels with diverging directions

The categories are classified in reference to prediction of histology and treatment decision.