ERBB2 and breast carcinoma: The same group is currently recruiting for a phase II trial assessing 68Ga-NOTA-HER2 nanobody uptake in brain metastasis of breast carcinoma patients (NCT03331601), a phase I/II trial for 68Ga-NOTA-MMR-VHH2 nanobodies (NCT04168528), and a feasibility trial for anti-idiotypic nanobodies in multiple myeloma patients (NCT03956615).