![]() Lymph nodes are major sites of B and T lymphocytes and other white blood cells making them vital parts of the immune system. They are linked by the lymphatic vessel as part of the circulatory system. Lymph nodes are oval or kidney-shaped glands that are widely spread out throughout the body. Having swollen cervical lymph nodes, also known as cervical lymphadenopathy, can often be a sign of infection, as the nodes also serve to filter out potentially harmful pathogens and microorganisms from the lymphatic system. ![]() As part of the immune system, the glands contain scavenging white blood cells that fight off infections. Posterior cervical lymph nodes are a group of glands located behind the neck, or in the cervical region of the spine.
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