**3. Acute pericarditis**

Acute pericarditis is a condition defined by the inflammation of the pericardial sac that can take place in the setting of a systemic disease (infectious, malignant, inflammatory, etc.) or independently of any other condition [2, 5, 13–15]. Among the elderly, it is important to consider malignancy in the evaluation of etiology as it is more common in this population and may prompt appropriate testing leading to a faster diagnosis and potential earlier intervention.
