Figure 2

Frozen sections stained with the BCL-6 mAb of representative T cell non-Hodgkin lymphomas (T-NHLs) expressing the BCL-6 protein. A, Anaplastic large cell lymphoma (ALCL, Case 10); B, lymphoblastic lymphoma (LBL, Case 3). Two-color staining of a reactive lymph node (C) and a thymus specimen (D) with BCL-6 and CD4 mAbs. The intra- and interfollicular BCL-6–positive cells and certain cortical thymocytes exhibit the double staining. GC, germinal center.