Serous Cystadenocarcinoma Arising in Presumed Vitelline Duct Remnant: A Case Report and Implications in the Management of Cancer of Unknown Primary

Figure 6

The tumor cells were strongly positive for CK7 (a), CK19 (b), CA19.9 (c), and MUC1 (d) (immunohistochemical staining, 100x).

(a)

(b)

(c)

(d)