Figure 3From: Composite lymphoma in the anterior mediastinum: a case report and review of the literatureImmunohistochemical features of the tumor. (A)Immunohistochemical study demonstrates that Reed-Sternberg cells are positive for CD30 (Envision × 100). (B) Immunohistochemical study shows that diffuse large B-cell lymphoma cells is positive for CD20 (Envision × 100).Back to article page