title: Segmental absence of the aortic wall: magnetic resonance imaging sign of aneurysm.
abstract: A thin-walled, posttraumatic false aneurysm of the descending aorta in a 32-year-old man was obvious on chest radiography, computed tomography, and aortography. The wall of the aneurysm was not visualized on a magnetic resonance imaging study. However, a segmental absence of the lateral wall of the descending aorta indicated the level of the abnormality. This finding was not observed on 100 consecutive normal aortas studied with gated magnetic resonance imaging. It was observed in 2 of 50 normal aortas on nongated thoracic magnetic resonance imaging.
mesh_terms: D000328:Adult; D001013:Aorta, Thoracic / Q000473:pathology; D001014:Aortic Aneurysm / Q000473:pathology*; D002114:Calcinosis / Q000473:pathology; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008297:Male