2021年9月15日 · The superior vena cava (SVC) is a large valveless venous channel formed by the union of the brachiocephalic veins. It receives blood from the upper half of the body (except the heart) and returns it to the right atrium.

2024年12月18日 · Superior vena cava obstruction (SVCO) can occur from extrinsic compression, intrinsic stenosis, or thrombosis of the superior vena cava. Malignancies are the main cause and are considered an oncologic emergency. Superior vena cava syndrome (SVCS) refers to the clinical syndrome with symptoms that results from this obstruction.

2025年3月9日 · Superior vena caval (SVC) duplication is the most common form of a left-sided SVC, where the normal right-sided SVC remains. The right SVC, however, can be smaller in approximately two-thirds of such cases 3 .

2022年9月26日 · Ultrasound of the jugular, subclavian, and innominate veins can help to identify a thrombus within the vessel lumen. Radiographic imaging and MRI also play a critical role in providing additional information about the SVC obstruction's location, severity, and etiology.

2012年7月1日 · CT scan is the key examination for the exploration of SVCS. It specifies the characteristics of the stenosis, its aetiology and detects collateral venous routes. Scannography reconstructions provide a true map of the obstacle, indispensable in planning …

2015年10月9日 · Acquired abnormalities such as intrinsic and extrinsic strictures, fibrin sheath, thrombus, primary neoplasms, and trauma can produce mild narrowing to complete occlusion, the latter leading to SVC syndrome. Each imaging modality plays a role in evaluation of the SVC, helping to determine the site, extent, and cause of pathologic conditions and ...

Interventional radiology is generally the preferred therapy for critical SVC syndrome, since it may allow for immediate resolution (unlike chemotherapy or radiotherapy, which can take weeks to have an effect).

2017年3月25日 · CXR findings in SVC syndrome include a widened mediastinum and the presence of a mass near the SVC. What CT finding is closely associated with SVC syndrome? The presence of collateral vessels is a CT finding that closely relates to SVC syndrome.

2021年4月26日 · Diagnosis of SVC thrombosis by CT includes lack of SVC enhancement; intraluminal filling defects or narrowing; and visualization of the collateral vessels. The modality of choice for SVCS is...

The superior vena cava (SVC) is the largest central systemic vein in the mediastinum. Imaging (ie, radiography, computed tomography [CT], magnetic resonance [MR] venography, and conventional venography) plays an important role in identifying congenital variants and pathologic conditions that affect the SVC.