Evaluate filling defect within the proximal descending thoracic aorta as seen on recent CTA. CHEST:LUNGS AND PLEURA: No significant abnormality noted.MEDIASTINUM AND HILA: Demonstrated again is a peripheral filling defect within the proximal descending thoracic aorta which is pedunculated in appearance distally and adherent to the anteromedial inferior distal aortic arch wall. The pedunculated component measures approximately 1.0 x 0.8 cm (series 2201/69). There is no contrast enhancement of this lesion and the pedunculated component appears slightly decreased in size compared to the recent CTA. The lesion demonstrates intrinsic T1-weighted hyperintensity favoring blood product.CHEST WALL: No significant abnormality noted.LUNG BASES: Small right greater than left pleural effusion.
The peripheral filling defect within the proximal descending thoracic aorta demonstrates T1-weighted hyperintensity, no contrast enhancement and short interval decrease in size favoring adherent bland thrombus. 