GRPR and breast cancer: In analogy to highly accurate molecular imaging techniques in other tumor entities (e.g., prostate cancer) [6,11], [68Ga]RM2 positron emission tomography (PET)/computed tomography (CT) targeting the gastrin-releasing peptide receptor (GRPR) could help detecting the oligometastatic stage in patients with BC and might, thus, improve accurate stratification of this patient group.