A rare case of pseudoaneurysm at the site of untreated coarctation of the aorta in an adult patient

Figures

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  Fig. 1. a Preoperative contrast-enhanced CT scan: a saccular aortic aneurysm is observed at the site of aortic coarctation (arrow). Collateral circulation appears well developed. b Preoperative contrast-enhanced CT scan, sagittal section: a saccular aortic aneurysm protruding dorsally is observed. The aneurysm wall appears very thin (arrow). c Preoperative contrast-enhanced CT scan, axial section: a dorsally protruding saccular aortic aneurysm is observed, the arterial wall other than the aneurysm appears highly calcified. d Postoperative contrast-enhanced CT scan: the stenosis was completely resected

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  Fig. 2. a Intraoperative image: a saccular aortic aneurysm protruding dorsally at the coarctation site (arrow). b Enlarged image: the aneurysm wall appears thin

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  Fig. 3. a A photo of the resected aneurysm from the intima side: the intima is macroscopically missing at the aneurysm entrance (arrow). b Elastica van Gieson staining of the aneurysm wall: the aneurysm wall has a clearly thinner wall structure than the other parts. c Enlarged findings (within the square): histologically, the intima and media are absent. Several layers of elastic fibers were found (arrow); therefore, a pseudoaneurysm consists of the adventitia only