RC48-ADC in HER2-low Advanced Breast Cancer

Summary

To evaluate the efficacy and safety of Disitamab vedotin (RC48-ADC) as salvage treatment in patients with HER2-low advanced breast cancer who have received up to one previous chemotherapy for recurrent or metastatic disease without previous use of antibody-drug conjugate.

Eligibility

Inclusion Criteria:

* Female patients aged ≥18 years
* Expected survival ≥12 weeks
* ECOG 0-1
* Histologically confirmed invasive advanced or metastatic breast cancer that is incurable and unresectable
* At least one measurable lesion according to the RECIST 1.1
* No history of antibody-drug conjugate use
* Up to one previous chemotherapy for advanced disease
* Available hormone receptor status. Hormone receptor-positive subjects are allowed to receive no more than two previous endocrine therapy for advanced disease
* HER2-low tumors, defined as IHC1+ or IHC2+ with negative FISH test; or HER2-ultralow tumors, defined as incomplete and faint membrane staining in \>0 but ≤10% of tumor cells
* Adequate organ function

Exclusion Criteria:

* History of thromboembolic events
* Uncontrolled systemic diseases, including diabetes, hypertension, interstitial lung disease, cirrhosis, etc.
* Active infections requiring systemic treatment
* Pregnant or lactating
* Presence of brain metastases and/or carcinomatous meningitis

Conditions3

Interventions1

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