(a)
(b)
(c)
(d)
(e)
(f)
Figure 1: (a) Diffuse infiltration of the dermis by large lymphoid tumor cells with variable proportions of centroblasts and immunoblast-like cells (Hematoxylin-Eosin: magnification X400), (b–e) Positive immunostaining of large tumor cells for CD20, CD5, MUM1, and Bcl2, respectively (magnification X200) and (f) Ki67 immunostaining in approximately 90% of large tumor cells.