Pericardial effusion in patients with giant cell arteritis has been described in case reports. The exact prevalence of this manifestation is unknown. The objective of this study was to determine the prevalence and characteristics of pericardial effusion in patients with giant cell arteritis. Retrospective data were collected from 114 patients at a single hospital with giant cell arteritis diagnosed between October 1999 and July 2013. Pericardial effusion was found in four patients (3.5?%, 95?% confidence intervals 1-8.7). In three cases, pericardial effusion was present at initial presentation and was asymptomatic. In one case, pericardial effusion was associated with aortitis and diagnosed at 6?months on thoracic CT scan because of relapse of the disease when corticosteroid was reduced. Prognosis was good in all cases. The present study confirms that pericardial effusion could occur in patients with giant cell arteritis. However, pericardial effusion is a rare manifestation of giant cell arteritis. Clinical course of pericardial effusion in the setting of giant cell arteritis is usually benign and rarely symptomatic. Recognition of this manifestation may contribute to early diagnosis of the disease.
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