Intrapericardial developmental cyst.
D000328:Adult; D000792:Angiography; D003560:Cysts / Q000000981:diagnostic imaging / Q000196:embryology / Q000209:etiology* / Q000473:pathology; D006801:Humans; D008297:Male; D010496:Pericardium / Q000196:embryology / Q000473:pathology; D013909:Thorax / Q000033:anatomy & histology