**5. Targeted molecular agents of breast cancer**

Molecular probes in nuclear medicine are the proof of principle for targeted molecular imaging and therapy. Molecular nuclear medicine holds the unique potential of being able to find, diagnose and treat diseases as well as to monitor treatment response. Several molecular targeting agents have been approved for clinical uses in nuclear medicine. Many others are under preclinical evaluation with high potential for clinical applications. The molecular targeting agents, that are common in nuclear medicine, are small molecules, oligonucleotides /PNAs, affibodys, peptides and antibodies.
