CD4-positive diffuse large B-cell lymphoma: A variant with aggressive clinical potential

Figure 1 Diffuse effacement of underlying tissue architecture by neoplastic cells in left maxillary sinus biopsy, patient 1 (hematoxylin and eosin, original magnification × 400).

Figure 2 Large malignant cells with increased nuclear:cytoplasmic ratio, multiple nucleoli, irregular and nuclear contours arranged in sheets, case 1 (hematoxylin and eosin, original magnification × 1000).

Figure 3 Immunohistochemistry results (clockwise). A: CD20 (original magnification × 200); B: CD5 (original magnification × 200); C: CD4 (original magnification × 200); D: CD4 (original magnification × 1000).