“…Studies applying a radiolabelled tracer with or without additional blue dye, however, were promising. The majority of the studies reported results favouring the sentinel lymph-node concept (Koch et al, 1998;Shoaib et al, 1999Shoaib et al, , 2001Alex et al, 2000;Zitsch et al, 2000;Mozzillo et al, 2001;Stoeckli et al, 2001Stoeckli et al, , 2002Barzan et al, 2002;Werner et al, 2002a, b). Groups who worked with blue dye report of an extravasation of the blue dye into the tissue (Pitman et al, 2002).…”