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In the lymphatic system, a lymph node is a secondary lymphoid organ. A lymph node is enclosed in a fibrous capsule and is made up of an outer cortex and an inner medulla. Lymph nodes become inflamed or enlarged in various diseases, which may range from trivial throat infections to life-threatening cancers.
Localized lymphadenopathy: due to localized spot of infection; e.g., an infected spot on the scalp will cause lymph nodes in the neck on that same side to swell up; Inflammatory localized lymphadenopathy at right mandibular angle. Generalized lymphadenopathy: due to a systemic infection of the body; e.g., influenza or secondary syphilis
Tuberculous lymphadenitis. Peripheral tuberculous lymphadenitis (or tuberculous adenitis) is a form of tuberculosis infection occurring outside of the lungs. [1] In general, it describes tuberculosis infection of the lymph nodes, leading to lymphadenopathy. When cervical lymph nodes are affected, it is commonly referred to as " Scrofula." [2]
The lymph nodes are found in proximity to unique white blood cells that engulf or metabolize pathogens (bacteria and viruses) and defective or cancerous cells, preventing infections and malignant cancer cells from spreading. [4] Infection spreads out of the wound site to enter the lymphatic system. The wound may be small or it may be an abscess ...
Lymphadenitis is an infection of the lymph nodes usually caused by a virus, bacteria or fungi. Symptoms include redness or swelling around the lymph node. [citation needed] Lymphangitis. Lymphangitis is an inflammation of the lymph vessels. Symptoms usually include swelling, redness, warmth, pain or red streaking around the affected area.
The lymphatic system, or lymphoid system, is an organ system in vertebrates that is part of the immune system, and complementary to the circulatory system. It consists of a large network of lymphatic vessels, lymph nodes, lymphoid organs, lymphatic tissue and lymph. [1][2] Lymph is a clear fluid carried by the lymphatic vessels back to the ...
Cervical lymph nodes. Cervical lymph nodes are lymph nodes found in the neck. Of the 800 lymph nodes in the human body, 300 are in the neck. [4] Cervical lymph nodes are subject to a number of different pathological conditions including tumours, infection and inflammation. [5]
Disease. Scrofula is the term used for lymphadenopathy of the neck, usually as a result of an infection in the lymph nodes known as lymphadenitis. It can be caused by tuberculous or nontuberculous mycobacteria. About 95% of the scrofula cases in adults are caused by Mycobacterium tuberculosis, most often in immunocompromised patients (about 50% ...
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