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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.


Review Date: 2/8/2024
Reviewed By: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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