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A balloon-like cardiac myxoma mimicking a blood-filled cyst
Xiaofang Zhong1, Shuyu Luo1, Lixin Chen2
1Shenzhen People's Hospital (Shenzhen Medical Ultrasound Engineering Center, Department of Ultrasound, The Second Clinical Medical College, The First Affiliated Hospital, Jinan University, Southern University of Science and Technology), Shenzhen, 518020, China.
Background:
Myxoma is the most common benign cardiac tumor. We reported a rare variant of balloon-like cystic cardiac myxoma.
Case Presentation:
A 54-year-old woman presented with exertional dyspnea, chest tightness, and intermittent dizziness. Electrocardiogram and laboratory studies were unremarkable. Transthoracic echocardiography(TTE) revealed a balloon-like cystic mass in the left atrium mimicking a blood-filled cyst. Contrast echocardiography demonstrated a contrast-filled lesion with iso-myocardial enhancement. Transesophageal echocardiography(TEE) identified a distinct arterial inflow at the cyst base and an outflow orifice, which was further confirmed during surgery by the administration of cardioplegic solution. The mass was successfully resected and confirmed a cystic cardiac myxoma.
Discussions:
Cystic myxoma is a rare variant with only few cases reported. The presented balloon-like variant of myxoma exhibited unique anatomical and hemodynamic features that elucidate its formation mechanism.