PMC9467735_01
Magnetic resonance imaging at our institution revealed a lesion measuring 8.6 x 13.5 cm.
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A subsequent cardiac MRI showed a partly mobile intrapericardial mass anterior to the right atrium (RA) and right ventricle (RV) measuring 8.6 x 13.5 cm in size (Figure 1).
(a) IMRT radiation treatment plan and dose-volume histogram: clinical target volume (CTV) (red line): 95% of the dose going to 100% of the volume; planning target volume (PTV) (purple line): 95% of the dose going to 95% of the volume; heart (peach-colored line): mean heart dose of 17.2 Gy; lung (blue line): V20 = 5% and V5 = 75%. (b) Dose-volume histogram.
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The mean heart dose was 17.2 Gy, and the volume of the lung receiving 20 Gy was 5% (Figures 2(a) and 2(b)).
Follow-up magnetic resonance imaging demonstrated decreased size of the lesion posttreatment measuring 3.98 x 10.1 cm.
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A repeat cardiac MRI (Figure 3) a year after treatment showed a significant decrease in the size of the tumor and no reaccumulation of pericardial fluid.
Follow-up magnetic resonance imaging demonstrated decreased size of the lesion posttreatment measuring 2.96 x 7.17 cm.
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The most up-to-date MRI as of June 2022 was read as continued decrease in size in the mass upon comparison to prior imaging (Figure 4).