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Initial contrast-enhanced computed tomography (CT) of the chest revealed the left main pulmonary artery (PA) aneurysm (arrow) and mediastinum hematoma. Three-dimensional CT of the PA also revealed an irregular shaped aneurysm (arrow) indicating pseudoaneurysm.
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Traumatic PAP (tPAP) was resolved gradually 10 days later, and regained normal diameter 2 months later (Figure 1).