Fig. 2

Radiologic, microscopic and immunohistochemical findings of the aortic tumor, artherosclerotic lesion, and basilar artery. CT scan with contrast showed a mass lacking contrast enhancement on the aortic arch (Panel a and b, arrows). Randomly selected artherosclerotic lesions of the aorta with no visible tumor also contained atypical lymphoid cells on its surface (Panel c and d; staining with H&E). These lymphoid cells were positive for CD79a (Panel e) and negative for CD3 (Panel f). Aggregated atypical lymphoid cells were also found in a plaque of the basilar artery (Panel g and h; H&E)