Figure 6.

Double immunohistochemical staining of survivin and Ki-67 or cleaved caspase-3. A: Survivin/Ki-67 staining. All survivin-positive cells (red) were also Ki-67-positive cells (brown) (×60). Some cells were only positive for Ki-67 (arrows). B: Survivin/cleaved caspase-3 staining. A wide number of tumor cells were positive for survivin expression (red) but only few cells were stained with the antibody against cleaved caspase-3 (brown). No double-positive cells were found. Original magnification, ×1000.