Table 2: Common CK7 and CK20 staining patterns [43,44]

Primary Tumor

CK7

CK20

Lung

+

-

Breast

+

-

Ovary

+

-

Thyroid

+

-

Salivary gland

+

-

Colon

-

+

Stomach

-/+

+

Merkel-Cell

-

+

Pancreas

+

+

Adrenal

-

-

Renal

-

-

Hepatic

-

-

Prostate

-

-