I went to the surgeon and he advised not to do a temporal lobe biopsy while on 12 ml of prednisone and 4.5 ml Low Dose Naltrexone(LDN) Because it could give a possible false negative. Instead I was referred to a specific Ophthalmologist who is supposed to be able to see if I have GCA. So far she could not see anything but could not rule that I won't have it in the future.