Polymyalgia rheumatica is a rheumatic disease which mainly affects the elderly, and is seldom diagnosed in patients <50 years of age. The prevalence of polymyalgia rheumatica is approximately 16.8 to 53.7 per 100,000 of the population >50 years of age. Patients may present with spiking fever, malaise, fatigue, weight loss and other features suggesting inflammation, which in each case requires differential diagnosis from malignancies. Neoplastic disease in turn can manifest itself in symptoms resembling those of polymyalgia, which are named "polymyalgia-like syndrome" and are in fact paraneoplastic syndromes presenting as polymyalgia rheumatica. These observations suggest that a careful clinical evaluation and a long term follow-up are necessary for a correct diagnosis of polymyalgia rheumatica.
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