ICG lymphography is a scan of the superficial lymphatics, helps define lymphatic dysfunction and delineates individualized lymphedema treatment. This study also helps visualize lymphedema in the asymptomatic limb. Superficial lymphatics accounts for 70% of the lymphatic system. Indocyanine green (ICG) is a contrast that fluoresces in the near-infrared range and therefore needs a special camera to be seen after injection. Low dose ICG injected into the subcutaneous tissue has been used to map lymphatics; this is known as ICG lymphography. The ICG binds to a protein called albumin, which is taken up into the lymphatics, and transported within the lymph fluid. In this way, the function of the lymphatics can be assessed.
Physical Medicine Institute Orlando
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