A 56 year-old patient presented to the emergency room with chest pain and 26mmHg blood pressure gap between right arm and left lower limb. The hypothesis of aortic dissection was evaluated through chest CT, which showed a Stanford type A aortic dissection with extension through the pulmonary artery and the presence of an intramural hematoma extending along the main and right pulmonary arteries (Figure 1). The intramural hemorrhage extended along the right lower lobe pulmonary arteries, and

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... was resultant peribronchovascular ground glass opacity, consistent with pulmonary hemorrhage (Figure 2). The patient underwent surgical repair of the type A dissection. Ten days after surgery, she was discharged asymptomatic. Chest CT was repeated after three months and complete regression of all abnormalities was observed (Figure 3). The extension of Stanford type A aortic dissection through pulmonary artery is a result of rupture through the posterior aspect of the aortic root into the common adventitia of the aorta and pulmonary artery 1. As the blood continues to dissect into the more peripheral pulmonary branches, it can lead to pulmonary hemorrhage. Sueyoshi et al. demonstrated that the extension of pulmonary hemorrhage into alveoli and double barrel aortic dissection are predictors of poor prognosis in this scenario 2. Figure 1: Computed tomography angiography of the chest showing a Stanford type A aortic dissection with contrast extravasation into the wall of the main pulmonary artery (arrow).