Figure 2.

Immunoreactivity for CD100 in a case of predominantly small-cell-type follicular non-Hodgkin’s lymphoma. A: Representative neoplastic tissue fixed in 10% buffered formaldehyde, paraffin embedded, sectioned, and stained with H&E. B: CD100 immunoperoxidase staining of frozen neoplastic tissue. Neoplastic cells are nonreactive for CD100. Scattered, reactive T cells within the neoplastic follicle, as well as reactive T cells in the interfollicular zone, are strongly immunoreactive for CD100.