Figure 2. (A) Solid tumor made up of lymphocytes with germinal center formation. (B) At higher magnification, (arrow) large cells of clear eosinophilic cytoplasm and round nuclei (epithelial cells) are also observed. (C) The tumor has invaded the pleura, passing through it. (D) The tumor has invaded the mediastinal adipose tissue. (E) In the hypocellular bone marrow only megakaryocytes (big arrow) and myeloid elements are observed (short arrow). (F) Immunohistochemical staining against glycophorin C is only positive on red cells; no erythroid precursor-like cells are observed.