Fig. 3From: Mammary mucinous cystadenocarcinoma with long-term follow-up: molecular information and literature reviewImmunohistochemical features of the lesion. a Cytokeratin 7 was strongly and diffusely positive for neoplastic cells. b The Ki-67 index of the tumor cells. c Overexpression of p53 protein. d Myoepithelial markers were absent (p63). e Myoepithelial markers were absent (calponin). f Focal positive expression of PD-L1 in immune cells within the tumorBack to article page