In another study by Brown and Ruoslahti in 2004, phage display strategy was employed in a mouse model of breast cancer metastasis, which revealed that a gene identical to AEG-1 was expressed at high levels in relation to metastasis of breast cancer, and the identified gene was named metadherin after its proposed role in promoting homing of breast cancer cells to the lungs [2]. Here, MTDH is linked to breast cancer.