Fig. 1

Dotted line represents the injection site, and the solid line represents SLN. a and b: patient injected with ^99mTc-Rituximab (37 MBq in 1 ml); 2 SLNs were detected; c-f: patient injected with fTcSC (37 MBq in 1.5 ml), 4 SLNs were detected. The SLNs shown in figure panels (a) and c, b and d were detected the same location. The extra SLNs marked in panels (e) and f correspond to IMLN and clavicular lymph node, respectively