宮沢 総介¹, 香坂 茂美¹, 成味 純¹, 宮田 晴夫¹, 林 淳一郎¹, 森本 典子², 鈴木 晴彦²

Sosuke MIYAZAWA¹, Shigemi KOHSAKA¹, Jun NARUMI¹, Haruo MIYATA¹, Junichiro HAYASHI¹, Noriko MORIMOTO², Haruhiko SUZUKI²

¹聖隷三方原病院循環器科, ²聖隷三方原病院臨床検査科

¹Seirei Mikatabara General Hospital Department of Cardiology, ²Seirei Mikatabara General Hospital Central Laboratory

キーワード : Right atrial thrombus, Two-dimensional echocardiography

We report the case of a 84-year-old man with a thin-walled cystic mass in the right atrium. The cystic mass was clearly demonstrated by two-dimensional echocardiography. He died from miltiple organ failure. At autopsy, a whitish, rough-surfaced cystic mass was found attached to the right atrial wall between the superior vena cava and the right atrial appendage. Under microscopic examination, the wall of the cyst was revealed to be composed of platelets, fibrin and red blood cells. To our knowledge, this type of right atrial thrombus has not been previously reported.