A Case of Left Atrial Synovial Sarcoma Observed by Transthoracic and Transesophageal Echocardiography
中山 浩二1, 寺柿 政和2, 渡辺 弘之2, 坂元 一夫1, 戸田 為久2, 秋岡 要2, 生野 善康1, 末広 茂文3, 竹内 一秀2, 吉川 純一2
Koji NAKAYAMA1, Masakazu TERAGAKI2, Hiroyuki WATANABE2, Kazuo SAKAMOTO1, Iku TODA2, Kaname AKIOKA2, Yoshiyasu IKUNO1, Shigefumi SUEHIRO3, Kazuhide TAKEUCHI2, Junichi YOSHIKAWA2
1多根総合病院内科, 2大阪市立大学第1内科, 3大阪市立大学第2外科
1Department of Internal Medicine, Tane General Hospital, 2First Department of Internal Medicine, Osaka City University, 3Second Department of Surgery, Osaka City University
Echocardiography, Primary cardiac tumor, Recurrence, Synovial sarcoma
Synovial sarcoma is a very rare primary tumor of the heart. Only six cases have been reported. Here we report an additional
case, that of a 29-year-old man who complained of a dry cough. A chest x-ray revealed cardiomegaly. Transthoracic and
transesophageal echocardiogrms showed a less mobile homogenous tumor that occupied most of the left atrial cavity and caused
the hemodynamic consequence of mitral valvular stenosis. A hard elastic mass was found arising from the posterior wall of the
left atrium on surgery. Microscopically, the tumor was diagnosed as a synovial sarcoma with a biphasic growth pattern.
Metastases were not found. During the echocardiographic follow-up the tumor grew rapidly in the left atrium, but with no
clinical manifestations. We considered it to be a recurrence.