• Shinichi Taguchi, Atsuo Mori, Ryo Suzuki, Ichiro Hasegawa, Hiroaki Sato, Hitoshi Sugiura, and Rie Irie.
• Departments of Cardiovascular Surgery (Drs. Mori, Suzuki, and Taguchi), Radiology (Drs. Hasegawa and Sato), and Pathology (Drs. Irie and Sugiura), Kawasaki Municipal Hospital, Kawasaki, Kanagawa 210-0013, Japan.
• Tex Heart Inst J. 2014 Feb 1; 41 (1): 76-9.

AbstractMediastinal schwannomas are sometimes diagnosed as pericardial or bronchogenic cysts, if cystic degeneration is extensive. When mediastinal schwannomas are not diagnosed as primary cardiac tumors, the use of cardiopulmonary bypass in their resection appears to be infrequent. We report the case of a 48-year-old woman who presented with symptoms from a suspected intrapericardial cyst. Multiple diagnostic images revealed a large mass, potentially a proteinaceous or hemorrhagic cyst, in the transverse sinus behind the ascending aorta and against the left main trunk. After complete resection with the use of cardiopulmonary bypass, the mass was identified as a benign extracardiac schwannoma. More than 3 years postoperatively, the patient had no relevant symptoms. We discuss the preoperative diagnosis, the method of resection, and our broad strategy for dealing with such a case.

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