MedlinePlus Medical Encyclopedia: Lymph tissue in the head and neck.

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Lymph tissue in the head and neck.

Lymph nodes play an important part in the body's defense against infection. Swelling might occur even if the infection is trivial or not apparent.

Update Date: 5/15/2008

Updated by: Alan Berger, MD, Assistant Professor, Divisions of Cardiology and Epidemiology, University of Minnesota, Minneapolis, MN. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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