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Figure 8. Skin contamination with radiotracer.(a) Frontal image showing bilateral axillary sentinel nodes in a 32-year-old male with an upper anterior chest wall melanoma, the image is degraded by multiple focal areas of increased tracer uptake over the right side of the scalp due to contamination. A lead shield has been placed over the injection site (arrow). (b) Frontal image from a 41-year-old female with a left chest wall melanoma showing a left axillary sentinel node and an area of abnormal uptake in the midline at the root of the neck which could represent a further node (arrow). (c) Following skin washing a repeat frontal image confirms that this area of abnormal update was due to skin contamination and not a node.
