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Relationship between Neovascularization and Aortic Wall Enhancement in Type A Aortic Dissection.
Eisaku Ito1, Takao Ohki2, Naoki Toya1
1Division of Vascular Surgery, Department of Surgery, The Jikei University Kashiwa Hospital, Chiba, Japan.
Aorta (Stamford, Conn.)
|December 31, 2024
Summary
Aortic wall enhancement (AWE) in Type A aortic dissection (TAD) progresses over time. Pathological findings show increased granulation tissue and fibrous complex of internal adventitia (FCIA) correlate with AWE, indicating neovascularization.
Area of Science:
- Cardiovascular Research
- Vascular Biology
- Medical Imaging
Background:
- Aortic wall enhancement (AWE) on computed tomography angiography is linked to aortic remodeling in Type B aortic dissection.
- This study investigates the correlation between AWE and pathological aortic wall findings in Type A aortic dissection (TAD).
Purpose of the Study:
- To elucidate the relationship between Aortic Wall Enhancement (AWE) and pathological changes in the aortic wall.
- To assess how AWE evolves over time in patients with Type A aortic dissection (TAD).
Main Methods:
- Pathological examination of aortic wall samples from twelve patients with Type A aortic dissection (TAD).
- Samples were analyzed from hyperacute, acute, and subacute phases of the dissection.
Main Results:
- Aortic wall enhancement (AWE) thickness significantly increased over time (0 mm to 2.8 mm).
- Granulation tissue and fibrous complex of internal adventitia (FCIA) showed significant increases, correlating with AWE.
- Neovascularization was abundant in granulation tissue and FCIA, consistent with AWE thickness.
Conclusions:
- Aortic wall enhancement (AWE) is present in Type A aortic dissection (TAD) and progresses with time.
- The development of FCIA and granulation tissue, indicative of neovascularization, underlies AWE in TAD.
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