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Special Feature
November 1999

Radiological Case of the Month

Arch Pediatr Adolesc Med. 1999;153(11):1195-1196. doi:

Figure 1. Frontal chest radiograph at age 6 months. A retrocardiac rounded mass is identified and splays the left main stem bronchus.

Figure 2. Computed tomographic scan of the chest at the level of the left atrium. Intravenous contrast enhancement shows that the retrocardiac mass enhances homogeneously and is closely associated with the thoracic aorta.

Figure 3. Magnetic resonance image of the chest (coronal T1-weighted sequence). There is flow void in the lesion that arises from the thoracic aorta with which it communicates via a broad neck. The lesion is a vascular structure with active blood flow.

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