Four out of nine TTF-1 positive endometrial carcinomas with data on ER, PR, and p53 from previous studies ([40] data on ER and p53 are not published) demonstrated a wildtype pattern of p53 and absence of ER and PR immunostaining, in combination with the morphological features in line with the “mesonephric-like endometrial carcinoma” subtype. This evidence concerns the gene ESR1 and endometrial carcinoma.