Edinburgh prop Simon Berghan could miss the start of Scotland's Six Nations campaign following his red card against Glasgow Warriors.
The 27-year-old was dismissed in the fifth minute of Edinburgh's derby win for a stamp to the head of Warriors hooker Fraser Brown.
World Rugby's foul play regulations state that "stamping, trampling the head shall result in a top-end entry-point sanction" of at least 12 weeks.
However, the disciplinary panel may make discretionary reductions based on Berghan's record and/or plea.