Figure 3: Photomicrograph of samples from patients. A,B. Case 1. A: The lesion is a diffuse large B-cell lymphoma. H and E, original magnification x200. B, MIB-1 index 24%. MIB-1 staining x 400. C, D. Case 2. C: The lesion is a diffuse grade 2 astrocytoma with a MIB-1 index of 12%. H and E, x200 (C). MIB-1 staining, x200 (D).