Computed tomography scans at first clinical presentation and 3 months later. (A) Coronal contrast-enhanced CT scan at first clinical presentation shows a flattened eccentric thrombus in the main right pulmonary artery (black arrows). (A’) Repeat CT scan after 3 months of treatment shows the shrunken thrombus formation (black arrow). (B, B’) Coronal contrast-enhanced CT scans at the time of first diagnosis and 3 months later show multiple filling defects both at the bifurcation and in the left pulmonary arteries (white arrows). (C, C’) Axial contrast-enhanced CT scans show dilatation of the right ventricle (RV), dilatation of the right atrium, and thickening of the RV free wall both at initial presentation and 3 months later. LPA: left pulmonary artery; LV: left ventricle; RA: right atrium; RPA: right pulmonary artery; RV: right ventricle.