Figure 1).

A Patient 1. Computed tomography scan with intravenous contrast demonstrating dilation of the right pulmonary artery (RPA, 4.6 cm) and left pulmonary artery (LPA, 4.3 cm). An intraluminal filling defect (arrow) is seen in the RPA, measuring 6.8 cm × 2.3 cm in maximal dimension. The presence of internal calcification and stability of this mass for more than three years suggested that this filling defect was an organized clot. B Patient 2. Computed tomography scan demonstrating severe dilation of the RPA (8.3 cm) and LPA (4.6 cm). A mural thrombus is seen within the RPA (arrow)