MUC6 and neoplasm: The IHC examination of vaginal tumor cells revealed CK7(+), CDX-2(+), CEA(+), CA199(+), GATA3(+), TTF-1(local+), MUC5(+), Villin(+), and Ki67(+70%), whereas IHC staining was negative for ER, PR, P53, P16, CA125, CK20, HNF1-β, Napsin-A, and MUC6.