{Reference Type}: Case Reports {Title}: Pericardial actinomycosis. {Author}: Paterson GE;Dickens FJ;Hurdman JA;Pirzada OM; {Journal}: BMJ Case Rep {Volume}: 17 {Issue}: 1 {Year}: 2024 Jan 9 暂无{DOI}: 10.1136/bcr-2023-257733 {Abstract}: A man in his 50s, with a history of night sweats and weight loss, presented acutely with dyspnoea and chest pain. Imaging revealed right middle lobe consolidation and a large pericardial effusion. The diagnosis of actinomycosis was made using endobronchial ultrasound-guided sampling from the pericardial effusion. An orthopantomogram demonstrated that the source was a large cavity in the left lower wisdom tooth. This tooth was extracted before the completion of his antibiotic course, and the patient made a full recovery. Cardiac actinomycosis is rare, and there are few case reports describing endobronchial ultrasound-guided sampling of pericardial fluid.