Résumé : Radioligand therapy (RLT) targeting prostate-specific membrane antigen (PSMA) improves survival in metastatic castration-resistant prostate cancer. PSMA is also expressed in triple-negative breast cancer (TNBC), a subtype with limited treatment options. This prospective study assessed PSMA uptake on [68Ga]Ga-PSMA-11 PET/CT in patients with metastatic TNBC (mTNBC) to evaluate the feasibility of PSMA-targeted RLT.