(a)
(b)
(c)
(d)
Figure 2: Histological and immunohistochemical staining of intravascular lymphoma cells. Small vessel lumen involved by lymphoma cells in the (a) brain (hematoxylin and eosin (H&E), ×100), (b) bladder (H&E, ×400), and (c) thyroid (H&E, ×40). (d) The neoplastic lymphoid cells in the coronary artery are positive for CD20 (H&E, ×200).