Compared with adjacent normal tissues, elevated Src expression and/or activity has been reported in a wide range of tumour types, including breast cancer (Verbeek et al, 1996) and in many of these tissues, an increase in Src activity correlates with disease stage or malignant potential (Aligayer et al, 2002; Weiner et al, 2003). Here, SRC is linked to breast carcinoma.