Figure 1.
Case 1: chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL). Some areas of this biopsy show a proliferation of monotonous small cells compatible with CLL/SLL (A, H&E, 200×). The small B cells are positive for PAX5 (B, 200×), CD5 (C, 200×), and CD23 (D, 200×). H&E indicates hematoxylin and eosin.