EGFR and cancer: Therapeutic antibodies that bind to the extracellular domain of EGFR, block its downstream signaling and inhibit cell growth;16 however, these can cause severe side effects.17 7D12 belongs to a class of single domain antibody fragments isolated from camelids that have gained importance due to their small size and deep tissue penetration,18 and has shown promise in treatment of cancers in mice model.19