MKI67 and neoplasm: Predominantly endometrioid, grade 3 and morphologically heterogeneous in half of the cases, statistically associated with characteristic myometrial infiltration patterns (MELF and tumor budding), intense intra- and peri-tumoral lymphocytic infiltrate (iTILs and sTILs), high mitotic rate and high Ki67 proliferative index (see Figure 4).