Clinical medicine (London, England)
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Fever of unknown origin (FUO) is sometimes a diagnostic dilemma for clinicians. Endocrine causes reported in the literature include subacute thyroiditis, thyrotoxicosis, adrenal insufficiency and pheochromocytoma. Among these, subacute thyroiditis is often overlooked as it can occasionally lack typical symptoms. This case illustrates the fact that subacute thyroiditis should be considered as a possible cause of fever even if signs and symptoms of hyperthyroidism and thyroid tenderness are absent.
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In this article, we report on a 22-year-old patient with myocardial infarction, which was the initial manifestation of polycythaemia vera. The awareness of myeloproliferative disorders as possible underlying disease - especially in young patients presenting with myocardial infarction - is crucial for clinical management, as a missed diagnosis can worsen the patient's further prognosis.