It must be reason: For that, the most common are: 1-nfection. 2-virus. 3-inflammation: infiltration with inflammatory cells during infection or inflammation in a region of a given lymph node. 4-cancer. 5-cancer of the blood: uncontrolled, malignant multiplication of lymphocytes as in lymphoma or leukemia.
Answered 4/1/2023
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Monitoring Centers: Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells/digested food. Lymph nodes "taste" the lymph everywhere for bad stuff like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well.
Answered 8/31/2013
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