Infectious dissecting aortic aneurysm due to Streptococcus pseudopneumoniae mimicked large vessel vasculitis

This report highlights about an infectious dissecting aortic aneurysm caused by a rare pathogen, Streptococcus pseudopneumoniae, which had to be initially diagnosed large vessel vasculitis (LVV). Even with the availability of FDG-PET, it may be difficult to distinguish between an infectious aortic aneurysm and LVV.