Fig. 5From: Expression of immune checkpoint regulators, programmed death-ligand 1 (PD-L1/PD-1), cytotoxic T lymphocyte antigen 4 (CTLA-4), and indolaimine-2, 3-deoxygenase (IDO) in uterine mesenchymal tumorsMetastatic Leiomyosarcoma. H&E stain of a case of metastatic leiomyosarcoma with pleomorphic cells (case# 57, Additional Table 1). The corresponding PD-L1 IHC stain showed 90% positivity of the tumor cells with an intensity of 3 + . (20 × objective). Abbreviations: H&E, hematoxylin & eosin; PD-L1, programmed death-ligand 1Back to article page