Feeding Artery of a Left Atrial Myxoma Demonstrated by Three-Dimensional Volume-Rendering Images With Multislice Computed Tomography
An 81-year-old man had a mass in the left atrium (LA) that was detected by transthoracic echocardiography at another hospital. To evaluate the characteristics of the mass, ECG-gated enhanced multislice computed tomography (CT) (Aquilion, Toshiba) was performed with a 1-mm slice thickness and helical pitch of 1.0. After intravenous injection of 100 mL of iodinated contrast material (30%), CT scanning was performed with retrospective ECG-gated reconstruction. After acquisition, volume data were extracted from end-diastole, and volume-rendering images were made on a workstation (M900, Zio).
Axial source images showed a mass that was partially enhanced by the contrast material with calcification in the LA, which suggested that the mass was not a thrombus but a tumor (Figure 1). In the 3-dimensional volume-rendering images, an aberrant artery was observed from the proximal portion of the left circumflex branch to the LA (Figure 2). Conventional coronary angiography revealed that all coronary arteries were angiographically normal and that there was a feeding artery from the proximal portion of the left circumflex branch to the LA (Figure 3). After those examinations, the mass in the LA was resected and diagnosed as a myxoma.
The editor of Images in Cardiovascular Medicine is Hugh A. McAllister, Jr, MD, Chief, Department of Pathology, St Luke’s Episcopal Hospital and Texas Heart Institute, and Clinical Professor of Pathology, University of Texas Medical School and Baylor College of Medicine.
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