In the initial biopsy, done at the dental office, the oral surgeon took only a tiny piece of the small white patch on my husband's tongue. As you can see from my signature, the results did not show cancer but warned that it could be hiding in areas not tested -- so an ENT did a more thorough excisional biopsy in an outpatient surgery center a month later and found very-early-stage SCC. In both instances my husband experienced minimal pain and had no problems, and the area healed just fine.
-- Leslie