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	Sentinel Lymph Node Biopsy: What Breast Cancer Patients Need to Know The sentinel lymph node is the first lymph node that the lymph ducts drain into. http://www.cancernews.com
	Breast Cancer and Lymph Nodes One of the principal functions of lymph nodes is the production of lymphocytes that are directed to the bloodstream to fight infection. http://ealthlink.mcw.edu
	Sentinel Lymph Node Biopsy - Cancer information on MedicineNet.com The sentinel lymph node is the first lymph node ("gland") to receive lymphatic drainage from a tumor. It stands sentinel over the tumor, so to speak. http://www.medicinenet.com