| Summary: | This study aims to explore computed tomography (CT) and magnetic resonance imaging
(MRI) features of patients diagnosed with primary cardiac angiosarcoma. The study involved the
analysis of 12 patients diagnosed with primary cardiac angiosarcoma who underwent non-contrast
(8/12) or contrast-enhanced CT (10/12) or MRI (4/12). Imaging appearances, including the tumor
location and adjacent infiltration, were analyzed. All 12 lesions were located in the right atrium with
a broad base. Adjacent invasion including the tricuspid valve and right ventricle (2/12), inferior
or superior vena cava (2/12), pericardium (10/12), and right coronary artery (7/12) was common.
On unenhanced CT scans, tumors in two patients were homogeneous in density, whereas the others
were inhomogeneous. Ten patients showed heterogeneous enhancement. The enhancement pattern
showed no direct correlation with the di erentiation degree of the tumor. Four lesions manifested
as heterogeneous intensity, with hyperintense hemorrhage foci on both T1- and T2-weighted MRI.
Three showed rim enhancement and one showed patchy enhancement. Primary cardiac angiosarcoma
often involves the right side of the heart with infiltration of peripheral structures. CT features include
typical inhomogeneous density on unenhanced scans and heterogeneous centripetal enhancement
on enhanced scans. A cauliflower-like appearance on both T1- and T2-weighted MRI is common.
The characteristic enhancement pattern of MRI remains to be determined
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