Transformation of marginal zone lymphoma into high-grade B-cell lymphoma expressing terminal deoxynucleotidyl transferase: A case report

Figure 3 Immunohistochemistry and cellular morphology of the third lymph node biopsy. A: The lymph node was infiltrated diffusely by medium to moderately large tumor cells, which showed little to moderate cytoplasm, round oval or slightly depressed nuclei with slightly rough chromatin and nucleoli (hematoxylin and eosin, 400 ×); B-F: The neoplastic cells were positive for CD20 (B), terminal deoxynucleotidyl transferase (D), B-cell lymphoma-2 (F) (about 90%), C-myelocytomatosis viral oncogene (E) (about 70%), Ki-67 (C) (approximately 80%), immunohistchemically (EnVision, 400 ×).