my husband had it and did some machine or something...i never saw what it was! . he is 13 months from radiation and chemo and you would never know looking at him that he had stage 4a BOT cancer except he lost 60 lbs and has put little of it back on. face back to normal for the most part. he says it's still a bit hard but not much under his chin. he started the treatment in the spring so 6-9 months so far.