- EEC G3 and other high-grade histologies (UEC/DEC, clear cell, carcinosarcoma)- rare histotypes (neuroendocrine tumors)- abundance in TIL and/or peritumoral lymphocytes- mixed cases- ambiguous morphologies- ambiguous immunophenotype (possible multiple classifiers)- subclonal p53 at IHC. Here, TP53 is linked to carcinosarcoma.