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Vasculitis mimicking bacterial endocarditis.

Marco Calachanis1, Paolo Ferrero, Fulvio Orzan

  • 1Cardiology Unit, Molinette Hospital, Turin, Italy. marcocalachanis@hotmail.com

Italian Heart Journal : Official Journal of the Italian Federation of Cardiology
|January 1, 2004
PubMed
Summary
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Fever of unknown origin can mimic endocarditis, especially in patients with heart valve disease. This case highlights Wegener's granulomatosis as a rare cause of fever, skin nodules, and malaise in such patients.

Area of Science:

  • Internal Medicine
  • Rheumatology
  • Cardiology

Background:

  • Fever of unknown origin (FUO) presents a diagnostic challenge due to overlapping systemic inflammatory responses.
  • Endocarditis is a critical diagnosis to exclude in patients with valvular heart disease presenting with FUO.
  • Systemic inflammatory conditions like autoimmune disorders can mimic infectious etiologies.

Observation:

  • A patient with known mitral valve prolapse and moderate regurgitation presented with fever, malaise, and cutaneous nodules.
  • The initial presentation suggested infectious endocarditis, a common concern in patients with valvular disease.
  • Diagnostic workup was complicated by the non-specific nature of the symptoms and the overlap with other systemic pathologies.

Findings:

  • Wegener's granulomatosis (now known as Granulomatosis with Polyangiitis) was diagnosed in the patient.

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  • This rare autoimmune condition presented atypically with symptoms mimicking infectious endocarditis.
  • The diagnosis required a comprehensive evaluation to differentiate it from other causes of FUO.

    • Implications:

    • Wegener's granulomatosis should be considered in the differential diagnosis of FUO, particularly in patients with pre-existing cardiac conditions.
    • Early recognition and diagnosis of Wegener's granulomatosis are crucial for appropriate management and to prevent severe complications.
    • This case underscores the importance of a broad differential diagnosis in FUO and the need to consider autoimmune disorders beyond infectious causes.