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False negative lymph node due to traversing of lymphatics through sentinel node without relaying into it. A Breast tumour. B Afferent lymphatic to sentinel lymph node. C Genuine sentinel lymph node without tumour metastasis. D Patent lymphatic carrying dye to non-sentinel lymph node (traversing sentinel lymph node without seeding it with tumour emboli). E Non-sentinel lymph node with tumour metastasis
