ERBB2 and breast carcinoma: For instance, monomeric affibody-based imaging probes, such as 68Ga-NOTA-MAL-Cys-MZHER2:342 and 99mTc-ZHER2:41071, have shown promising advances in visualizing HER2 expression in breast cancer, achieving high sensitivity and specificity for detecting HER2-positive lesions shortly after injection [35,36,37].