68Ga-FAPI-46 PET/CT for Predicting Histological Response in Triple-negative Breast Cancer (FAP-IT)

Prospective multicenter study evaluating the prediction of histological response of pembrolizumab in combination with neoadjuvant chemotherapy by pre-treatment 68Ga-FAPI-46 PET/CT imaging in patients with early-stage high-risk TNBC. Patients will receive the newly established standard of care of neoadjuvant pembrolizumab 200 mg Q3W given with 4 cycles of paclitaxel + carboplatin, then with 4 cycles of doxorubicin or epirubicin + cyclophosphamide. After definitive surgery, patients will receive adjuvant pembrolizumab for 9 cycles or until recurrence or unacceptable toxicity. The 68Ga-FAPI-46 PET/CT scan will be performed for each patient pre-therapy and on the same machine as the 18F-FDG PET/CT scan and within 14 days before the start of treatment.