Figure 4. Immunostains of the mucinous cystadenocarcinoma. a. CA 19-9; b. CK7; c. CK8/18; d. CK19; e. MUC-1; f. CD10 of the peri-cystic stroma. The anaplastic component showed in panel b. (lower right) and panel c. (upper left) is negative for CK7 and CK8/18.