Pulmonary Artery Sling Blurs the Distal Trachea on Frontal Chest Radiography.

Teaching Point: The pulmonary artery sling can be suspected on frontal chest radiography, not only by ancillary findings like lobe/lung emphysema or persisting atelectasis, but also blurring of the distal trachea or carina.

Acute Volvulus of the Cecum.

Teaching Point: Abnormal embryological cecal fixation may lead to volvulus, which accounts for approximately 1 to 3 percent of all colic obstructions. A pack of suggestive CT features can make the diagnosis.