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Click A 53-year-old woman with invasive thymoma with extensive intraluminal tumor thrombus. Axial non-contrast-enhanced computed tomography shows an ill-defined, heterogenous, calcified anterior mediastinal mass. Note the enlargement of the superior vena cava and left brachiocephalic vein.

Click A 53-year-old woman with invasive thymoma with extensive intraluminal tumor thrombus. Early phase (25 seconds after 60 ml Iohexol administration) axial contrast enhanced CT images shows an ill-defined, heterogenous, calcified anterior mediastinal mass. The anterior mediastinal mass shows heterogenous enhancement. There is a filling defect in the superior vena cava and left brachiocephalic vein suggesting thrombosis. The thrombus is extending to the right atrium. Note the enhancement of the thrombus.

Click A 53-year-old woman with invasive thymoma with extensive intraluminal tumor thrombus. Late phase(70 seconds after 60 ml Iohexol administration) axial contrast enhanced CT images shows an ill-defined, heterogenous, calcified anterior mediastinal mass. There is a filling defect in the superior vena cava and left brachiocephalic vein suggesting thrombosis. The thrombus is extending to the right atrium. The mass and the thrombus shows enhancement.

Click A 53-year-old woman with invasive thymoma with extensive intraluminal tumor thrombus. Non-contrast-enhanced T1-Weighted MR images shows heterogenous hypointense anterior mediastinal mass lesion. Note the enlarged superior vena cava and left brachiocephalic vein.

Click A 53-year-old woman with invasive thymoma with extensive intraluminal tumor thrombus. Non-contrast enhanced T2-Weighted MR images shows heterogenous hyperintense anterior mediastinal mass. Thrombus in the superior vena cava and left brachiocephalic vein shows similar instensity to that of the mass. There are cystic changes in both the mass and the thrombus.