Polymyalgia rheumatica.

Polymyalgia rheumatica should be considered when a syndrome of constitutional symptoms, especially weight loss, low-grade fever, weakness, wasting proximal muscles, fatigue, malaise and depression, is seen in the elderly. Giant-cell arteritis plays a part later in the course. Thus the need for biopsy of a long segment of the temporal artery to help in determining diagnosis and therapy. An elevated erythrocyte sedimentation rate (ESR) is an important clue. The usual high value is about 80 mm/hour; if it is over 100 mm/hour, giant-cell arteritis should be suspected. Salicylates, indomethacin, phenylbutazone and hydroxychloroquine produce some clinical improvement but do not lower the high ESR; moreover, the patients are prone to experience relapses. Prednisone, however, not only produces clinical improvement but lowers the high ESR. Potassium p-aminobenzoate may be useful in maintaining the remission.