Giant cell arteritis and polymyalgia rheumatica: clues to early diagnosis.

Giant cell arteritis (GCA) and polymyalgia rheumatica (PMR) are closely related disorders found predominantly in older patients. These disorders, which are being recognized more frequently, are more common in women, in Caucasians, and in various geographic locations. Early recognition and treatment may prevent possible catastrophic consequences of GCA, such as blindness, stroke, or dissection of the aorta. Although diagnosis is fairly easy with the classic presentation, it may be missed when the patient presents with nonspecific constitutional symptoms. An increased awareness among primary care physicians will aid in the prevention of much of the morbidity and mortality related to these diseases.