Common symptoms of<unk>  include: * bruits * fever * headache * tenderness and sensitivity on the scalp * jaw claudication (pain in jaw when chewing) * tongue claudication (pain in tongue when chewing) and necrosis * reduced visual acuity (blurred vision) * acute visual loss (sudden blindness) * diplopia (double vision) * acute tinnitus (ringing in the ears) * stroke * polymyalgia rheumatica (in 50%) The inflammation may affect blood supply to the eye; blurred vision or sudden blindness may occur. In 76% of cases involving the eye, the ophthalmic artery is involved, causing<unk>  anterior ischemic optic neuropathy.<unk>  may present with atypical or overlapping features. Early and accurate diagnosis is important to prevent ischemic vision loss. Therefore, this condition is considered a medical emergency. While studies vary as to the exact relapse rate of<unk> , relapse of this condition can occur. It most often happens at low doses of prednisone (<20 mg/day), during the first year of treatment, and the most common signs of relapse are headache and polymyalgia rheumatica. Associated conditions The varicella-zoster virus (VZV) antigen was found in 74% of temporal artery biopsies that were<unk> -positive, suggesting that the VZV infection may trigger the inflammatory cascade. The disorder may co-exist (in about half of cases) with polymyalgia rheumatica (PMR), which is characterized by sudden onset of pain and stiffness in muscles (pelvis, shoulder) of the body and is seen in the elderly.<unk>  and PMR are so closely linked that they are often considered to be different manifestations of the same disease process. PMR usually lacks the cranial symptoms, including headache, pain in the jaw while chewing, and vision symptoms, that are present in<unk> .<unk>  can affect the aorta and lead to aortic aneurysm and aortic dissection. Up to 67% of people with<unk>  having evidence of an inflamed aorta, which can increase the risk of aortic aneurysm and dissection. There are arguments for the routine screening of each person with<unk>  for this possible life-threatening complication by imaging the aorta. Screening should be done on a case-by-case basis based on the signs and symptoms of people with<unk> .
Giant cell arteritis
AL amyloidosis
Takayasu's arteritis
Stroke
Lupus headache
Medication overuse headache
Myofascial pain syndrome
Cluster headache