Figure 1.
Immunohistochemical staining of tumor-infiltrating T lymphocytes. (A) After reviewing the tissue sections, three intense foci of staining were selected (magnification, ×12). Immunohistochemical detection of (B) CD3+ T lymphocytes, (C) CD4+ helper T lymphocytes, (D) CD8+ cytotoxic T lymphocytes, (E) forkhead box P3+ regulatory T lymphocytes and (F) granzyme B+ activated cytotoxic T lymphocytes in consecutive sections (magnification, ×400). CD, cluster of differentiation.