CTICasesAortitis in Giant Cell Arteritis
Imaging findings
CT angiography shows segmental dilation of the ascending aorta and proximal arch with concentric wall thickening, along with a beaded, irregular caliber pattern of the descending thoracic aorta. Histopathology confirmed a lymphocytic infiltrate in the media, consistent with large vessel vasculitis.
Key takeaways
Giant cell arteritis (GCA) is a large-vessel vasculitis that typically affects elderly patients. While temporal artery involvement is classic, GCA can involve the thoracic aorta, causing aortitis, aneurysms, and wall thickening. The disease can be monitored with PET-CT showing FDG-avidity in the aortic wall.
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