Mesothelial/monocytic incidental cardiac excrescences of the heart — a report of three cases

Abstract Mesothelial/monocytic incidental cardiac excrescences (MICE) are uncommon pseudotumours and may histologically mimic metastatic adenocarcinoma. They consist of nonneoplastic proliferations of mesothelial cells intermingled with foamy macrophages enmeshed in fibrin. There are only around 40 cases reported in literature, and it is important that the pathologists should be aware of this lesion especially while dealing with cardiac surgery specimens. We report a series of three cases of MICE that were incidentally discovered during valve replacement surgeries.