Figure 2: TILs are present in the majority of osteosarcoma tumors.

(A) H&E staining was used to assess the presence of TILs in osteosarcoma samples. Samples were graded as having no TILs, low TILs (<30% TILs), or high TILs (>30% TILs). Scale bar, 100 μM. (B) TILs are present in the majority of osteosarcoma samples at all times of specimen collection. (C) TILs are present at high levels in osteosarcoma regardless of the HHLA2 status.