A case of biopsy-negative temporal arteritis--diagnostic challenges.

A patient with systemic symptoms but no visual loss was investigated for suspected giant cell arteritis. Initial temporal artery biopsy was reported as negative; however, she returned with visual loss 2 months later, and the diagnosis of giant cell arteritis was confirmed with a subsequent biopsy. In hindsight, signs suggestive of the disease were present in the original biopsy, although the usual diagnostic features were absent.