HLA-G and neoplasm: HLA-G was found to be expressed at either low, intermediate or strong densities in 16 of the 47 treatment-naive EwS biopsies (34%), either on the tumor cells (14 of 47, 30%) (Figure 2A, 2C) and/or on infiltrating lymphocytes (8 of 47, 17%) (Figure 2B, 2C).