Left fourth and sixth costovertebral dislocation abutting the aorta.

While rib fractures are common in blunt thoracic trauma, dislocations of the costovertebral joints (CVJs) are extremely rare and typically involve the first, eleventh, or twelfth rib. We report a rare case of dislocation of the left fourth and sixth CVJs in a 36-year-old man who was run over by a car. The rib heads were displaced anteriorly, abutting the aorta.

Migration of the azygos vein from the azygos fissure to the mediastinum.

We report a case of migration of the azygos vein from an azygos fissure into the mediastinum following a large right pleural effusion.

CT of the paraumbilical and ensiform veins in patients with superior vena cava or left brachiocephalic vein obstruction.

The purpose of this study was to elaborate on the anastomoses between the paraumbilical and systemic veins, particularly the ensiform veins. The connections with the ensiform veins have received little attention in the anatomical and radiological literature, and remain incompletely described. Too small to be reliably traced in normal CT scans, the paraumbilical veins can dilate in response to increased blood flow from systemic veins in superior vena cava obstruction (SVCO), allowing a study of their arrangement and connections.

CT of the bronchopulmonary veins in patients with superior vena cava or left brachiocephalic vein obstruction.

Objective: The purpose of this study was to show the arrangement and connections of the bronchopulmonary veins (i.e., vessels draining the bronchi, bronchioles, and pleura in patients with chronic superior vena cava (SVC) or left brachiocephalic vein (LBCV) obstruction using CT.

Reversed halo sign in acute pulmonary embolism and infarction.

Background: The reversed halo sign, originally described in cryptogenic organizing pneumonia, has been observed in a variety of pulmonary diseases, including pulmonary embolism (PE).

Purpose: To describe the computed tomographic (CT) findings in patients with the reversed halo sign and acute PE at initial presentation and in subsequent scans.

Material And Methods: Contrast-enhanced CT examinations of 12 patients with the reversed halo sign and acute PE were analyzed retrospectively.

CT demonstration of the extracardiac anastomoses of the coronary veins in superior vena cava or left brachiocephalic vein obstruction.

CT scans in four cases of chronic superior vena cava or left brachiocephalic vein obstruction demonstrate a systemic-to-cardiac collateral venous pathway through anastomoses between the pericardial branches of systemic veins and the presumed adventitial veins of the ascending aorta and pulmonary trunk. These adventitial veins then drain into tributaries of the anterior cardiac veins or ventricular coronary veins.