Descending Thoracic Aortic Aneurysm: Thoracic CT Findings after Endovascular Stent-Graft Placement1
Toyohiko Sakai, MD,
Michael D. Dake, MD,
Charles P. Semba, MD,
Tetsuhisa Yamada, MD,
Akihiko Arakawa, MD,
Stephen T. Kee, MD,
Nobushige Hayashi, MD,
Mahmood K. Razavi, MD and
Daniel Y. Sze, MD
1 From the Department of Cardiovascular and Interventional Radiology, Stanford University Medical Center, 300 Pasteur Dr, Suite H3630, Stanford, CA 94305-1056 (T.S., M.D.D., C.P.S., T.Y., A.A., S.T.K., M.K.R., D.Y.S.), and the Department of Radiology, Fukui Medical University School of Medicine, Fukui, Japan (N.H.). Received April 1, 1998; revision requested June 25; revision received September 14; accepted December 16. Address reprint requests to M.D.D. (e-mail: mddake@stanford.edu).

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Figure 1a. Contrast-enhanced chest CT images depict a saccular aneurysm of the descending thoracic aorta. (a) Before stent-graft placement, aneurysm (arrow) has some mural thrombus (arrowhead). (b) Two days after placement, the thrombotic aneurysm is depicted, as are the stent-graft (arrow) and bilateral pleural effusions (arrowheads). (c) Six months after placement, the pleural effusions are improved.
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Figure 1c. Contrast-enhanced chest CT images depict a saccular aneurysm of the descending thoracic aorta. (a) Before stent-graft placement, aneurysm (arrow) has some mural thrombus (arrowhead). (b) Two days after placement, the thrombotic aneurysm is depicted, as are the stent-graft (arrow) and bilateral pleural effusions (arrowheads). (c) Six months after placement, the pleural effusions are improved.
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Figure 1b. Contrast-enhanced chest CT images depict a saccular aneurysm of the descending thoracic aorta. (a) Before stent-graft placement, aneurysm (arrow) has some mural thrombus (arrowhead). (b) Two days after placement, the thrombotic aneurysm is depicted, as are the stent-graft (arrow) and bilateral pleural effusions (arrowheads). (c) Six months after placement, the pleural effusions are improved.
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Figure 2a. Chronic posttraumatic aneurysm. (a) Chest radiograph and (b) thoracic CT image obtained before treatment depict a large descending thoracic aortic aneurysm (arrowhead) and narrowing of the left main bronchus (arrow). (c) Chest radiograph obtained 12 hours after placement of the stent-graft (arrow) shows complete opacity of the left hemithorax with ipsilateral mediastinal shift consistent with atelectasis. A Palmaz stent (Johnson & Johnson Interventional Systems, Warren, NJ) was placed in the left main bronchus 18 hours after the procedure. (d) Chest CT image obtained 5 days after stent-graft placement demonstrates thrombotic aneurysm (black arrow), patent stent-graft (black arrowhead), the Palmaz stent in the left main bronchus (white arrow), and some aeration (white arrowhead) in the collapsed left lung. (e) Chest radiograph obtained at 25 days and (f) thoracic CT image obtained 6 months after stent-graft placement demonstrate the stent-graft (arrowhead), the Palmaz stent in the left main bronchus (arrow), and resolution of the left-lung atelectasis.
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Figure 2c. Chronic posttraumatic aneurysm. (a) Chest radiograph and (b) thoracic CT image obtained before treatment depict a large descending thoracic aortic aneurysm (arrowhead) and narrowing of the left main bronchus (arrow). (c) Chest radiograph obtained 12 hours after placement of the stent-graft (arrow) shows complete opacity of the left hemithorax with ipsilateral mediastinal shift consistent with atelectasis. A Palmaz stent (Johnson & Johnson Interventional Systems, Warren, NJ) was placed in the left main bronchus 18 hours after the procedure. (d) Chest CT image obtained 5 days after stent-graft placement demonstrates thrombotic aneurysm (black arrow), patent stent-graft (black arrowhead), the Palmaz stent in the left main bronchus (white arrow), and some aeration (white arrowhead) in the collapsed left lung. (e) Chest radiograph obtained at 25 days and (f) thoracic CT image obtained 6 months after stent-graft placement demonstrate the stent-graft (arrowhead), the Palmaz stent in the left main bronchus (arrow), and resolution of the left-lung atelectasis.
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Figure 2e. Chronic posttraumatic aneurysm. (a) Chest radiograph and (b) thoracic CT image obtained before treatment depict a large descending thoracic aortic aneurysm (arrowhead) and narrowing of the left main bronchus (arrow). (c) Chest radiograph obtained 12 hours after placement of the stent-graft (arrow) shows complete opacity of the left hemithorax with ipsilateral mediastinal shift consistent with atelectasis. A Palmaz stent (Johnson & Johnson Interventional Systems, Warren, NJ) was placed in the left main bronchus 18 hours after the procedure. (d) Chest CT image obtained 5 days after stent-graft placement demonstrates thrombotic aneurysm (black arrow), patent stent-graft (black arrowhead), the Palmaz stent in the left main bronchus (white arrow), and some aeration (white arrowhead) in the collapsed left lung. (e) Chest radiograph obtained at 25 days and (f) thoracic CT image obtained 6 months after stent-graft placement demonstrate the stent-graft (arrowhead), the Palmaz stent in the left main bronchus (arrow), and resolution of the left-lung atelectasis.
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Figure 2b. Chronic posttraumatic aneurysm. (a) Chest radiograph and (b) thoracic CT image obtained before treatment depict a large descending thoracic aortic aneurysm (arrowhead) and narrowing of the left main bronchus (arrow). (c) Chest radiograph obtained 12 hours after placement of the stent-graft (arrow) shows complete opacity of the left hemithorax with ipsilateral mediastinal shift consistent with atelectasis. A Palmaz stent (Johnson & Johnson Interventional Systems, Warren, NJ) was placed in the left main bronchus 18 hours after the procedure. (d) Chest CT image obtained 5 days after stent-graft placement demonstrates thrombotic aneurysm (black arrow), patent stent-graft (black arrowhead), the Palmaz stent in the left main bronchus (white arrow), and some aeration (white arrowhead) in the collapsed left lung. (e) Chest radiograph obtained at 25 days and (f) thoracic CT image obtained 6 months after stent-graft placement demonstrate the stent-graft (arrowhead), the Palmaz stent in the left main bronchus (arrow), and resolution of the left-lung atelectasis.
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Figure 2d. Chronic posttraumatic aneurysm. (a) Chest radiograph and (b) thoracic CT image obtained before treatment depict a large descending thoracic aortic aneurysm (arrowhead) and narrowing of the left main bronchus (arrow). (c) Chest radiograph obtained 12 hours after placement of the stent-graft (arrow) shows complete opacity of the left hemithorax with ipsilateral mediastinal shift consistent with atelectasis. A Palmaz stent (Johnson & Johnson Interventional Systems, Warren, NJ) was placed in the left main bronchus 18 hours after the procedure. (d) Chest CT image obtained 5 days after stent-graft placement demonstrates thrombotic aneurysm (black arrow), patent stent-graft (black arrowhead), the Palmaz stent in the left main bronchus (white arrow), and some aeration (white arrowhead) in the collapsed left lung. (e) Chest radiograph obtained at 25 days and (f) thoracic CT image obtained 6 months after stent-graft placement demonstrate the stent-graft (arrowhead), the Palmaz stent in the left main bronchus (arrow), and resolution of the left-lung atelectasis.
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Figure 2f. Chronic posttraumatic aneurysm. (a) Chest radiograph and (b) thoracic CT image obtained before treatment depict a large descending thoracic aortic aneurysm (arrowhead) and narrowing of the left main bronchus (arrow). (c) Chest radiograph obtained 12 hours after placement of the stent-graft (arrow) shows complete opacity of the left hemithorax with ipsilateral mediastinal shift consistent with atelectasis. A Palmaz stent (Johnson & Johnson Interventional Systems, Warren, NJ) was placed in the left main bronchus 18 hours after the procedure. (d) Chest CT image obtained 5 days after stent-graft placement demonstrates thrombotic aneurysm (black arrow), patent stent-graft (black arrowhead), the Palmaz stent in the left main bronchus (white arrow), and some aeration (white arrowhead) in the collapsed left lung. (e) Chest radiograph obtained at 25 days and (f) thoracic CT image obtained 6 months after stent-graft placement demonstrate the stent-graft (arrowhead), the Palmaz stent in the left main bronchus (arrow), and resolution of the left-lung atelectasis.
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Copyright © 1999 by the Radiological Society of North America.