Hello. I was trying to find out all I can about Hortons disease which my sister has been diagnosed with. She lives in Italy and has now been told she needs a biopsy to try to ascertain that it is hortons disease. She has been given large doses of steroids which has now been halved. So really all I am trying to do is to find out as much as I can but I suppose until the biopsy has been done, nothing can be done.