ICG Lymphography and Its Application

Indocyanine green (ICG) lymphography clearly visualizes superficial lymph flows in real time without ionized radiation exposure. Dynamic ICG lymphography, dual-phase fluorescent image observation, is important to maximize the efficacy of ICG lymphography for lymphatic mapping and appropriate severity staging. ICG lymphography findings change from “linear” to “splash” to “stardust” and finally to “diffuse” patterns with the progression of lymphedema. ICG lymphography allows pathophysiological severity staging for secondary lymphedema and classification of primary lymphedema.