Lymphoscintigraphy

General

• Tracer: Sulfur Colloid

• Give radiotracer and see where it goes, typically to identify sentinel lymph node

  • Most commonly for melanoma and breast cancer

  • Surgeon will then use a gamma camera to identify the node in surgery

  • They also use blue dye to identify the node/drainage pattern

  • Sometimes will not obtain images after tracer is given for breast cancer because the axillary node is easily identified by gamma camera in the OR

• Cutaneous malignancy (melanoma) —> intradermal injection

• Breast cancer —> subcutaneous areolar or peri-tumoral

• All purpose parallel hole collimator used