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Updated: Dec 8, 2025

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
A rare form of cardiac myxoma: interatrial septum tumor
Shingo Kunioka1, Kishu Fujita2, Shizuko Iwasa2
1Department of Cardiac Surgery, Asahikawa Medical University, Hokkaido, Japan.
A myxoma is one of the most common tumors in cardiac surgery, with most of them originating from the left or right atrial walls and causing embolic complications. An 84-year-old woman was referred to our institution after echocardiography showed an interatrial septum tumor that was presumed to be a thrombus; however, postoperative pathological examination revealed it to be a cardiac myxoma. This atypical myxoma was covered with a solid capsule containing connective tissue and substantial calcifications, which had made it difficult to establish a diagnosis of myxoma.
A myxoma is one of the most common tumors in cardiac surgery, with most of them originating from the left or right atrial walls and causing embolic complications. An 84-year-old woman was referred to our institution after echocardiography showed an interatrial septum tumor that was presumed to be a thrombus; however, postoperative pathological examination revealed it to be a cardiac myxoma. This atypical myxoma was covered with a solid capsule containing connective tissue and substantial calcifications, which had made it difficult to establish a diagnosis of myxoma.
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