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Open Access Case Report

A case of mesothelial/monocytic incidental cardiac excrescence and literature review

Zhong-Liang Hu1, Hui Lü2, Hong-Ling Yin1, Ji-Fang Wen1 and Ou Jin1*

Author affiliations

1 Department of Pathology, Xiangya Medical School, Central South University, Changsha, Hunan Province, China

2 Electron Microscope Lab, Xiangya Medical School, Central South University, Changsha, Hunan Province, China

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Citation and License

Diagnostic Pathology 2010, 5:40  doi:10.1186/1746-1596-5-40

Published: 21 June 2010

Abstract

Mesothelial/monocytic incidental cardiac excrescence (MICE) is a rare entity which is an amalgam of mesothelial cells, histiocytes, and fibrin, often found occasionally during cardiac valve replacement. We report a case in a 25-year-old Chinese female with serous mitral stenosis and patent foramen ovale. Routine and immunohistochemical stains and ultrastructure examination revealed the vegetation was predominantly composed of histocytes with scattered mesothelial cells. In fact nodular histiocytic/mesothelial hyperplasia (NHMH) is a similar lesion to MICE. MICE and NHMH could be unified, and NHMH may be a better choice.