AUTHOR=Liu Jiahui , Wang Zhi , Yang Ying , Xiong Yan , Wang Wei , Qiu Jianxing , Zhao Kai , Zheng Bo TITLE=Multimodal Diagnostic Workup of Primary Pericardial Mesothelioma: A Case Report JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=Volume 8 - 2021 YEAR=2021 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2021.758988 DOI=10.3389/fcvm.2021.758988 ISSN=2297-055X ABSTRACT=Background: Primary pericardial mesothelioma (PPM) is an extremely rare tumor, and early identification and accurate diagnosis may improve its clinical outcome. Case presentation: We herein report a case of a 70-year-old woman who presented with dyspnea. Conventional transthoracic echocardiography showed massive pericardial effusion. Contrast-enhanced ultrasonography revealed a hyperenhancing mass in the pericardium. Further imaging methods, including cardiac magnetic resonance imaging and positron emission tomography/computed tomography, showed invasion of the pericardial mass into the adjacent tissues and distant metastases. Pathologic examination of a puncture biopsy specimen finally confirmed the diagnosis of PPM. Conclusion: Pericardial masses are difficult to detect when a large amount of pericardial effusion is present and the mass is small. Combination of multiple modalities plays a meaningful role in identifying PPM.