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Figure 2: Advanced primary tumor. Extensive infiltration of lymphatic channels by tumor blocks frees passage of lymph and radiotracer to the true sentinel node. Redirection of lymph/radiotracer results in biopsy of a different node (”false sentinel node”), which may not accurately reflect the disease status of the remaining nodal basin

Figure 2: Advanced primary tumor. Extensive infiltration of lymphatic channels by tumor blocks frees passage of lymph and radiotracer to the true sentinel node. Redirection of lymph/radiotracer results in biopsy of a different node (”false sentinel node”), which may not accurately reflect the disease status of the remaining nodal basin