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Table 1 Quality of mesorectal excision according to M.E.R.C.U.R.Y. criteria [5].

From: TME quality in rectal cancer surgery

M.E.R.C.U.R.Y. I° Complete Mesorectum Smooth, intact
   Defects Not deeper than 5mm
   Coning No coning
   CRM Smooth, regular
M.E.R.C.U.R.Y. II° Nearly complete Mesorectum Moderate bulk, irregular
   Defects No visible muscularis propria
   Coning Moderate
   CRM Irregular
M.E.R.C.U.R.Y. III° Incomplete Mesorectum Little bulk
   Defects Down onto muscularis propria
   Coning Yes
   CRM Irregular