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Lymphandenitis is a swelling, or enlargement, of the lymph nodes. Swollen lymph nodes may occur for a variety of reasons. Some occur due to local infections, while others can appear due to systemic conditions or diseases. A similar term is lymphadenitis, also refers to inflammation of the nodes.

Lymphadenopathy diagnosis should be made by a physician or medical professional. The presence of other underlying causes, such as a particular infection, may assist in diagnosing the case. Physical examinations and medical history as well as a lymph node biopsy may also be used to diagnose. Additional tests may be ordered to determine whether a particular disease or infection is present. Details such as the size, location, length of time of the swelling, and whether there is pain may also be considered when attempting to determine the cause.

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