Only three studies correlated IHC results and PET/CT imaging features, reporting an association between FDG uptake and Ki67 [117,119], FDG uptake and tumour size in TNBC [117] and higher SUVmax with triple-negative and HER2-positive tumours [118].Three works focused on prediction studies combining IHC with MRI [113,115,116] or with PET [116]. The gene discussed is ERBB2; the disease is neoplasm.