The results of this study have demonstrated that the uptake (SUVmax) of [99mTc]Tc-ADAPT6 in HER2-positive primary tumours (8.8 ± 2.7) did not differ significantly (p > 0.05, paired t-test) from its uptake in the corresponding lymph node metastases (8.7 ± 4.6). The gene discussed is ERBB2; the disease is neoplasm.