Which CT finding supports acute mediastinitis diagnosis?

Which CT finding supports acute mediastinitis diagnosis?

• A. Pneumomediastinum on CT with IV and PO contrast
• B. Large renal mass
• C. Pulmonary edema without mediastinal changes
• D. Aortic dissection

Answer: (A)

Pneumomediastinum on CT with IV and PO contrast is a key clue that points to acute mediastinitis. Acute mediastinitis is an infection or inflammatory process of the mediastinal tissues, often arising from esophageal perforation or postoperative spread. Air in the mediastinal space (pneumomediastinum) reflects disruption of barriers and is a prominent radiologic sign of this condition. Using IV contrast helps highlight inflamed soft tissues, fat stranding, and any potential abscesses, while oral contrast can reveal leaks from the esophagus, strengthening the suspicion for infectious or perforative mediastinal processes. Other findings like a large renal mass occur outside the mediastinum and don’t explain mediastinal infection. Pulmonary edema without mediastinal changes shows heart- or volume-related lung findings rather than mediastinal infection. Aortic dissection is a vascular emergency with a different CT signature (such as an intimal flap and true/false lumen) and does not primarily present with mediastinal air.

Pneumomediastinum on CT with IV and PO contrast is a key clue that points to acute mediastinitis. Acute mediastinitis is an infection or inflammatory process of the mediastinal tissues, often arising from esophageal perforation or postoperative spread. Air in the mediastinal space (pneumomediastinum) reflects disruption of barriers and is a prominent radiologic sign of this condition. Using IV contrast helps highlight inflamed soft tissues, fat stranding, and any potential abscesses, while oral contrast can reveal leaks from the esophagus, strengthening the suspicion for infectious or perforative mediastinal processes.

Other findings like a large renal mass occur outside the mediastinum and don’t explain mediastinal infection. Pulmonary edema without mediastinal changes shows heart- or volume-related lung findings rather than mediastinal infection. Aortic dissection is a vascular emergency with a different CT signature (such as an intimal flap and true/false lumen) and does not primarily present with mediastinal air.