NPM1 and endometrial carcinoma: To determine the distribution of NPM1 in different clinical stages of endometrial carcinoma, NPM1 expression level was investigated in 31 endometrial tissues, including normal endometrium (n = 4), FIGO stage I (n = 8), FIGO stage II (n = 6), FIGO stage III (n = 9) and FIGO stage IV (n = 4) endometrial carcinoma tissues, using IHC, qRT-PCR and Western blotting.