How is benign lymph node enlargement?

Lymph nodes filter foreign particles, bacteria, and viruses, out of the lymphatic fluid • Most people will have had “swollen glands” at some time as a response to infection • Also called lymphadenitis, and hyperplasia • Can be acute (tender),or chronic (non-tender) • Usually subside in less than 6 weeks • Follicular hyperplasia is enlargement of the cortical 2nd follicles and increase in number of the cortical 2nd follicles • Sinus histiocytosis is prominence in medullary sinuses