pericardial mesothelial inclusion cyst
pericardial benign multicystic mesothelioma, pericardial multilocular mesothelial inclusion cyst
References
Drut R, Quijano G. Multilocular mesothelial inclusion cysts (so-called benign multicystic mesothelioma) of pericardium. Histopathology. 1999 May;34(5):472-4. PMID: 10231425