Table 2: Summary of relationship between ulcerative colitis treatment, magnifying endoscopic (ME) classifications following crystal violet staining, and microvascular pattern (MVP) in cases of Matts-2 endoscopic grade.

TherapyME classificationMVP type
ME-A
( )
ME-B
( )
ME-C
( )
ME-D
( )
MVP-R
( )
MVP-IR
( )

Mesalazine ( )01093517
Salazosulfapyridine ( )010001
Azathioprine + mesalazine ( )010304
None ( )021122

ME-A: regular arrangement of normal-appearing round to oval pits; ME-B: irregular arrangement with/without enlarged spaces between the even pits; ME-C: irregular pits in size and shape with more irregular arrangement of pits compared to ME-B; and ME-D: disrupted or disappeared pits. MVP-regular: regularly arranged in a honeycomb-like structure; MVP-irregular: MVP with irregular, tortuous structure.