CT images after the fourth cycle showed that the thrombus in the right brachiocephalic vein
had disappeared (Fig.
have coined a 'thoracic sandwich sign' in reference to anterior-mediastinal lymphadenopathy encompassing the brachiocephalic vein
on chest CT in a patient with T-cell lymphoblastic lymphoma.
The denture, including its attachment, was visualized at a level just below the clavicle near the brachiocephalic vein
Venography revealed total occlusion of both left internal jugular vein and brachiocephalic vein
, while normal flow of right subclavian vein was detected.
1 IJV=internal jugular vein, SV=subclavian vein, EJV=external jugular vein, 1=right atrium, 2=caudal third of superior caval vein, 3=cranial two thirds of superior caval or brachiocephalic vein
, 4=intrathoracic part of right SV, 5=intrathoracic part of left SV, 6=right UV, 7=left IJV, 8=other position.
The unilateral enlargement at initial presentation can be explained by the tumor and thrombus obstructing the flow from the right brachiocephalic vein
to a greater degree than the left brachiocephalic vein
The head of the snowman is formed by the dilated vertical vein on the left, the superior vena cava on the right and the left brachiocephalic vein
on top, while the body of the snowman is formed by the enlarged right atrium.
Axillary, subclavian, and brachiocephalic vein