PMC8387084_01
PMC8387084_02
PMC8387084_03
PMC8387084_04
Thoracoabdominal CT scan: A - red asterisk indicates the abdominal aortic aneurysm, yellow arrows indicate the calcium aggregated in the atherosclerotic plaque, blue arrow points toward the duodenal lumen and the duodenal wall adjacent to the aneurysm; B - red asterisk indicates the lumen of the aneurysm, the green line indicates the level of section A of the figure. CT: computer tomography.
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Previous medical history included pulmonary thromboembolism two months prior, when two AAA were reported on abdominal CT, both were fusiform, with the first one just below the diaphragm with a diameter of 40mm and a second one, 3mm below the left renal artery, with a diameter of 34mm (Figure 1).
PADF post-fixation on formalin: A - duodenal side of the fistula (probe placed in the orifice); B - aortic side of the fistula (probe placed in the orifice).
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PADF post-fixation on formalin: section through the level of the fistula, the "red star" indicates the lumen of the aortic aneurysm, the "yellow star" indicates the duodenal lumen, white arrow indicates the place of the communication.
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Histopathology from the area of penetration of the PADF; yellow asterisk indicates the preserved duodenal mucosa, black arrow indicates hemorrhages in the muscular layer of the duodenum, the red arrow indicates the area of penetration with diffuse hemorrhagic zones, blue arrow indicates the remnants of the aortic wall; hematoxylin and eosin stain, original magnification 40x.
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