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Walk the evidence base by book and chapter — the raw source passages that ground Ask, Differential, and the rest.
1 passage
Isolated aortitis: a rare cause of febrile illness. Febrile illness often presents a challenge for the clinician. The main causes of febrile illness are infections, solid or haematological malignancies and connective tissue disorders, including vasculitis. A 49-year-old woman sought medical attention because of intermittent fever that lasted 2 weeks. She presented no further symptoms or physical signs to suggest the aetiology. The epidemiological context was irrelevant. Analyses revealed anaemia of chronic disease and significant elevations of inflammatory parameters. A comprehensive study was performed, which revealed presence of an aortitis. Investigation of infectious and immunological causes was negative. We arrived at the definitive diagnosis of isolated aortitis. She was treated with corticosteroid and methotrexate, with resolution of symptoms and clinical abnormalities.