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Images and tattooed sentinel node of a patient with an axillary arch. (A) The 18F-fluorodeoxyglucose (FDG) positron emission tomography–computed tomography (PET-CT) scan shows increased FDG uptake by the metastatic axillary lymph node in the level I left axilla (arrow). (B) The PET-CT scan demonstrates the left axillary arch that is also known as the axillopectoral muscle (double arrow). (C) The hot and tattooed sentinel lymph node is retrieved.
