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What is "lymph node"

Longman Dictionary of Contemporary English
lymph node
noun
EXAMPLES FROM CORPUS
▪ B2 - extension through the rectal wall without lymph node involvement.
▪ Cervical lymph node biopsy showed a non-Hodgkin's lymphoma of follicular type.
▪ Of those cancers that seem to be limited to the prostate clinically, 25-35% will have lymph node metastases.
▪ The percentage of aneuploid tumours increased according to tumour invasion and the development of lymph node metastasis reflecting an increased genomic instability.
▪ To determine this they want to do their own biopsy, and will require a sizeable lymph node to go at.
The Collaborative International Dictionary
Lymph node

Lymph node \Lymph node\ (Anat.) A lymphatic gland.

Wiktionary
lymph node

n. (context anatomy immunology English) Small oval bodies of the lymphatic system, distributed along the lymphatic vessels, that are clustered in the armpits, groin, neck, chest and abdomen. They act as filters, with an internal honeycomb of connective tissue filled with lymphocytes and macrophages that collect and destroy bacteria, viruses and foreign matter from lymph. When the body is fighting an infection, these lymphocytes multiply rapidly and produce a characteristic swelling of the lymph nodes.

WordNet
lymph node

n. the source of lymph and lymphocytes [syn: lymph gland, node]

Wikipedia
Lymph node

A lymph node is an oval or kidney-shaped organ of the lymphatic system, present widely throughout the body including the armpit and stomach and linked by lymphatic vessels. Lymph nodes are major sites of B, T, and other immune cells. Lymph nodes are important for the proper functioning of the immune system, acting as filters for foreign particles and cancer cells. Lymph nodes do not deal with toxicity, which is primarily dealt with by the liver and kidneys.

Lymph nodes also have clinical significance. They become inflamed or enlarged in various infections and diseases which may range from trivial throat infections, to life-threatening cancers. The condition of the lymph nodes is very important in cancer staging, which decides the treatment to be used, and determines the prognosis. When swollen, inflamed or enlarged, lymph nodes can be hard, firm or tender.