From: Combined immunohistochemistry of β-catenin, cytokeratin 7, and cytokeratin 20 is useful in discriminating primary lung adenocarcinomas from metastatic colorectal cancer
Pattern of immunohistochemistry
β-catenin/CK 7/CK 20
Primary colorectal cancer (%)
Lung metastasis from colorectal cancer (%)
Primary lung acinar adenocarcinoma (%)
+
-
100
78.9
0
15.8
5.3
90.9
9.1