Polymyalgia rheumatica--a clinical study with particular reference to arterial disease

Area of Science:

• Rheumatology
• Immunology
• Vascular Medicine

Background:

• Polymyalgia rheumatica (PMR) is a condition affecting older adults, characterized by muscle pain and stiffness.
• Current diagnostic criteria, including erythrocyte sedimentation rate (ESR) of 50 mm/hr, are debated.
• Understanding the underlying pathophysiology of PMR is crucial for effective management.

Purpose of the Study:

• To review clinical and laboratory findings in 59 polymyalgia rheumatica cases.
• To question the necessity of a high ESR for diagnosis.
• To explore the potential arterial basis and autoimmune mechanisms in PMR.

Main Methods:

• Retrospective review of 59 polymyalgia rheumatica patient cases.
• Clinical examination focusing on the vascular tree.
• Laboratory investigations including viral antibody studies and lymphocyte transformation tests.

Main Results:

• An increased incidence of polymyalgia rheumatica was observed in summer and winter.
• Vascular bruits and tenderness were noted in some patients, resolving with treatment.
• Lymphocyte transformation studies supported an arterial basis for the disease, while viral studies were negative.

Conclusions:

• The erythrocyte sedimentation rate (ESR) threshold of 50 mm/hr for polymyalgia rheumatica diagnosis requires reevaluation.
• Vascular abnormalities may be a significant clinical feature of polymyalgia rheumatica.
• An autoallergic reaction to antigens in the internal elastic lamina is hypothesized as the cause of polymyalgia rheumatica.