Fig. 1

Endoscopic findings of the colon (a cecum, b sigmoid colon) and pathological findings of the sigmoid colon (c) when the case was diagnosed as EGE. Computed tomography scan showing wall thickening of the aortic arch, brachiocephalic artery, right and left subclavian artery and left common carotid artery as well as dilation of the ascending aorta (d, e). Positron emission tomography (PET) scans showing the FDG uptake along the aortic arch, brachiocephalic artery, right and left subclavian artery and left common carotid artery (f). Endoscopic findings of the colon (g cecum, h sigmoid colon) when the case was diagnosed to have TA