About this trial
In this study, we prospectively analyzed molecular subtyping through the PAM 50 test in HER2-negative (IHC1+ or 2+ (FISH/SISH-)) breast cancer patients. A phase 2 single arm study was designed to determine whether the addition of HER2-targeted treatment with treatment increases the pathologic remission rate.
Eligibility criteria
Qualifiers
definition of HER2 negative breast cancer i) HER2 IHC 1+ without ISH or ii) HER2 IHC 2+ and ISH negative (average HER2 gene copy number <4 signals/cell in single probe ISH or HER2/CEP17 ratio <2.0 & average HER2 gene copy number <4 signals cell in dual-probe ISH)
No prior treatment of stage II-III breast cancer
HR+ & HER2- breast cancer : cT1-4N1-3
HR- & HER2- breast cancer : cT1N1-3 or cT2-4N0-3
Disqualifiers
1) History of previous treatments of ipsilateral or contralateral invasive breast cancer 2) Confirmation of systemic distant metastasis of breast cancer 3) History of other malignancy within the last 5 years, except curatively treated basal cell carcinoma or squamous cell carcinoma of the skin or carcinoma in situ of the cervix, less than 2cm of thyroid cancer (papillary, follicular, medullary).
Trial design
Treatments tested in this trial
- Herzuma