FIGURE 2.

Lack of expression of myeloid nuclear differentiation antigen in the majority of chronic lymphocytic leukemia, follicular lymphoma, and mantle cell lymphoma cases. A case of chronic lymphocytic leukemia (top row, ×40; A, B), follicular lymphoma (middle row, ×40; C, D) and mantle cell lymphoma (last row, ×40; E, F), respectively, show myeloid nuclear differentiation antigen expression in residual mantle zone in follicular lymphoma and rare myeloid cells. The neoplastic cells are negative for myeloid nuclear differentiation antigen.