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Diagnosis and management of polymyalgia rheumatica
Abstract:
Polymyalgia rheumatica (PMR) is a common inflammatory condition of unknown aetiology with a prevalence of 1 in 133 in the over 50s, and a female to male ratio of 2:1. Symptoms develop over a matter of weeks; typically bilateral shoulder or pelvic girdle pain and stiffness, that is worse in the mornings. Associated symptoms include low-grade fever, malaise, fatigue, low mood, poor appetite, and weight loss. There is no specific diagnostic test for PMR but the usual pattern is a commensurate rise in CRP and ESR. A small proportion of PMR patients will have normal inflammatory markers. PMR is associated with giant cell arteritis (GCA). Half of patients with GCA will have some PMR symptoms and up to one fifth of patients with PMR will have evidence of GCA. Other conditions that can mimic PMR include: rheumatic disease in the elderly e.g. rheumatoid arthritis; inflammatory muscle diseases; thyroid disease; malignancy; infection; bilateral shoulder capsulitis; osteoarthritis, Parkinsonism and depressive illness. At diagnosis and each follow-up visit it is imperative to consider the potential for associated GCA. The patient should be asked about headaches, jaw claudication and visual disturbance. If there is any suspicion of GCA, urgent discussion with the rheumatologist should take place that day.
Insights
Polymyalgia rheumatica (PMR) is a common inflammatory condition affecting those over 50, causing pain and stiffness. Early recognition of PMR and potential associated giant cell arteritis (GCA) is crucial for timely management.
Area of Science:
- Rheumatology
- Internal Medicine
- Geriatrics
Background:
- Polymyalgia rheumatica (PMR) is a prevalent inflammatory disorder affecting individuals over 50.
- Characterized by bilateral shoulder and pelvic girdle pain and stiffness, often worse in the morning.
- Associated symptoms include fatigue, malaise, and low-grade fever.
Purpose of the Study:
- To outline the key diagnostic features of PMR.
- To emphasize the importance of differentiating PMR from other conditions.
- To highlight the critical association between PMR and giant cell arteritis (GCA).
Main Methods:
- Clinical presentation review of PMR.
- Diagnostic criteria and inflammatory markers (ESR, CRP) assessment.
- Differential diagnosis consideration including GCA, rheumatoid arthritis, and other mimics.
Main Results:
- PMR diagnosis relies on clinical pattern and elevated inflammatory markers (ESR/CRP), though some patients have normal markers.
- A significant overlap exists between PMR and GCA, with half of GCA patients experiencing PMR symptoms.
- Mimicking conditions include various rheumatic diseases, inflammatory myopathies, and osteoarthritis.
Conclusions:
- Prompt evaluation for GCA is essential in all PMR patients due to shared symptoms and potential for serious complications.
- Distinguishing PMR from mimics requires careful clinical assessment and consideration of associated conditions.
- Early rheumatologist consultation is vital if GCA is suspected.
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