The immunohistochemistry was performed to demonstrate the infiltrating CD56+ natural killer (NK) cells and CD163+ macrophages; CD4+ T cells or CD8+ T cells. Although LMS usually lacks lymphoid infiltrates recognizable on routine histological staining; further histological examination revealed a few infiltrating CD56+ NK cells in human uterine leiomyosarcoma tissues.
Figure 1: The infiltrating lymphocytes in human uterine leiomyosarcoma.