Fig. 3

Contribution of CK7 and CK20 stains to the diagnoses. A. Percentage of cases where CK7 and/or CK20 had major, minor, or no contribution to the final diagnosis among the three groups. p < 0.00001 by Fisher’s exact test comparing the proportions of non-major contribution and major contribution among three groups. B. Percentage of cases where CK7 and/or CK20 had major, minor, or no contribution to the determination of tumor origin among the three groups. p = 0.223 by Fisher’s exact test comparing the proportions of non-major contribution and major contribution among three groups. C. Percentage of cases where CK7 and/or CK20 had major, minor, or no contribution to the determination of tumor origin among the three groups in biopsy specimens. p = 0.413 by Fisher’s exact test comparing the proportions of non-major contribution and major contribution among three groups. D. Percentage of cases where CK7 and/or CK20 had major, minor, or no contribution to the determination of tumor origin in among the three groups resection specimens. p = 0.327 by Fisher’s exact test comparing the proportions of non-major contribution and major contribution among three groups