A benign neoplasm that involves the pericardium. The disease is MONDO_0021514 (benign neoplasm of pericardium). Also known as: benign neoplasm of the pericardium, benign pericardial neoplasm, benign pericardial tumor, benign pericardial tumour, benign tumor of pericardium, benign tumor of the pericardium, benign tumour of pericardium, benign tumour of the pericardium.