Fig. 1

Immunohistochemical expression of the lymphocyte activation gene-3 protein (LAG-3) in ovarian clear cell carcinoma (OCCC). (a, b) LAG-3-negative case: LAG-3 expression was observed in < 20% of the total tumor-infiltrative lymphocytes. (a: H & E, ×40; b: LAG-3, ×40); (c, d) LAG-3-positive case: LAG-3 expression was observed in > 20% of total tumor-infiltrative lymphocytes. (a: H & E, ×40; b: LAG-3, ×40). OCCC cells did not express LAG-3.