Hematoxylin and eosin staining
tumor
TUMOR, SECONDARY
Hematoxylin and eosin staining was performed on FFPE blocks of tumor biopsies collected before (pre-treatment) and 2-5 days after (post-treatment) Olvi-vec therapy. Semi-quantitative scoring of tumor cell density and immune cell density (0: very low density; 1: low density; 2: moderate density; 3: high density) was performed by a primary and secondary pathologist who were blinded to sample identity.