Treatment with sorafenib plus camrelizumab after splenectomy for primary splenic angiosarcoma with liver metastasis: A case report and literature review

Figure 7 The level of programmed death ligand-1 protein was detected using immunohistochemistry by the Dako programmed death ligand-1 immunohistochemistry 22c3 PharmDx kit. A: Hematoxylin and eosin staining of the specimen, shown at × 100 original magnification; B: Negative control for the test, shown at × 200 original magnification; C: Positive control for the test, shown at × 200 original magnification; D: Immunohistochemistry revealed that this patient was positive for programmed death ligand-1 (PD-L1) in the cytomembrane of tumor cells (trehalose-6-phosphate synthase = 20%, cervical pedicle screws = 22), shown at × 200 original magnification. The black arrows indicate cells with high PD-L1 expression.