PMC9402375_01
Preoperative enhanced computed tomography image. A mass on the posterior surface of the ascending aorta and main pulmonary artery is shown.
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Thoracoabdominal enhanced computed tomography (CT) revealed a homogeneous, large fatty mass extending from the posterior border of the main pulmonary artery to the dorsal left atrium, ascending aorta, and superior vena cava, which was penetrated by the bilateral pulmonary arteries (Figure 1).
Preoperative magnetic resonance imaging findings. Arrows indicate mass.
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Magnetic resonance imaging (MRI) revealed that the mass showed high signal intensity on T1-weighted imaging (Figure 2), while it was suppressed on fat-suppressed imaging and showed low signal intensity.
Operative image. The ascending aorta and main pulmonary artery were transected, and a mass was found on the posterior surface of the heart.
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Subsequently, when the main pulmonary artery was transected and the heart was removed, good exposure was obtained, and the tumor was found to be widespread on the posterior surface of the heart (Figure 3).
Image of the extracted mass.
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The size was 12.5 x 7 x 4 cm (Figure 4), and an intraoperative rapid diagnosis showed no malignant component.
Pathological findings. The tumor was formed by hyperplasia of mature adipocytes.
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