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Figure 4. Drainage to interval nodes.(a) Frontal image from a 56-year-old male with a melanoma on the right wrist demonstrating tracer uptake in a right epitrochlear node (arrow) and multiple right axillary nodes. The liver is seen in the lower portion of the image. Both the epitrochlear and sentinel axillary node were marked. (b) Early (5 min) and (c) delayed (30 min) prone images from a 27-year-old female with a right posterior chest wall melanoma show an unusual sentinel node on the posterior chest wall (b) (thin arrow) and subsequent uptake of tracer within a right axillary sentinel node (c). A lead shield was used to cover the injection site (thick arrows in (b) and (c)).
