Pathological evaluation
tumor
TUMOR
We evaluated TILs in preoperative tumor biopsy samples using a standard methodology for the visual assessment of hematoxylin and eosin (HE) sections. In brief, paraffin-embedded biopsy samples (4–5 μm) stained with HE were observed at a magnification of × 200 by experienced pathologists. The average TILs were counted from five different views surrounding each tumor according to the instructions of an international TILs working group [