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Frequency of immunostaining and KRAS mutations among breast cancer tumors.
| Subtype | Samples | CK5/6+ (%) | EGFR+ (%) | CK/EGFR+ (%)* | KRAS mut (%) |
|---|---|---|---|---|---|
| TN | 35 | 17 (48.6) | 25 (71.4) | 15 (42.8) | 0 (0.0) |
| BS | 27 | 17 (63.0) | 25 (92.6) | 15 (55.5) | 0 (0.0) |
*Positive staining for both CK5/6 and EGFR
Abbreviations: TN, triple-negative; BS, basal-like; CK, cytokeratin 5/6; KRAS mut, mutant KRAS
