KRT7 and colorectal carcinoma: Although the immunohistochemistry can distinguish metastasis from other organs with respect of colorectal carcinoma (CK7-/CK20+) in contrast to ovarian primaries (CK7+/CK20-/CK20+), its role in metastasis from gallbladder is limited because of similar profile to that of primary ovarian mucinous tumors [2,15].