Low back pain as presenting manifestation of giant cell arteritis associated to abdominal aortitis.

Giant cell arteritis (GCA) is the most common vasculitis in Western countries in individuals over the age of 50. The diagnosis is relatively straightforward when typical features, such as headache, jaw claudication or other ischemic complications are present. Although atypical presentations of GCA have been described, herein we report for first time low back pain as the presenting manifestation of this vasculitis. We also emphasize the importance of considering the use of positron emission tomography (PET) in the evaluation of GCA patients presenting without "overt" cranial ischemic manifestations.