ERBB2 and breast cancer: An analysis of 16 patients with metastatic BC, conducted bySörensen et al. [74], demonstratedgood visualization of small-sized foci, enabling the detection of breast cancermetastases in the liver, bones, lymph nodes, brain, and other organs.Furthermore, in two patients after the [68Ga]Ga-ABY-025 study, theHER2 status in the primary breast tumor was changed from negative to positive.In most cases, differences in HER2 expression between the primary tumor andmetastatic foci were found.