My dentist just noticed discoloration on the roof of my mouth (hard palate area only). There are purple streaks that look like bruising. No soreness and no raised or hard areas and nothing else that feels unusual. Has anyone else had this and could it be a Gleevec side effect? I've been on Gleevec since 2004, 800 mg Gleevec since 2006, and pcru for 4+ years. Oral surgeon looked at it and said he would check into it but did not recommend a biopsy at this point.