A necrotic lymph node contains tissue that is dead, usually due to an infection that prevents blood from flowing to the tissue, according to MedlinePlus. Although the condition is usually not serious, necrosis is not reversible and the tissue does not regenerate.Know More
Necrosis can be benign or it can indicate lymphoma, which is cancer of the lymph nodes, according to the Free Dictionary. Benign necrosis can result from viral or bacterial infections, such as cat-scratch disease; Epstein-Barr virus; fungal infection; chlamydia; a parasitic disease, such as toxoplasmosis; tuberculosis; trauma; blocked blood vessels; and Kawasaki's or Castleman's disease. Many cases are caused by more than one infectious agent. Patients who test positive for HIV have a higher risk of infection, according to the American Family Physician. Cancer of the lymph nodes can start in the lymph nodes, but more often it originates in other parts of the body and spreads through the lymph system, according to the American Cancer Society.
The lymph network is part of the body's immune system. It collects waste, such as carbon dioxide, bacteria and viruses, and delivers nutrients and white blood cells to the cells. Nodes become swollen while they are filtering infectious organisms, injured cells or cancer from the lymph fluid, the American Cancer Society explains. There are hundreds of lymph nodes throughout the body.Learn More
The spleen is like a lymph node because it contains lymphocytes.Lymphocytes are white blood cells that help the body fight off infections. Full Answer >
The jugulodigastric lymph node is a prominent lymph node in the deep lateral cervical group located behind the mandible, lying below the posterior belly of the digastric muscle and anterior to the internal jugular vein. The node receives lymphatic drainage from the pharynx, palatine tonsil, and tongue, according to medilexicon.com.Full Answer >
The left para-aortic lymph node has the primary job of receiving and processing drainage from the thoracic duct and abdominal cavity. The para-aortic lymph nodes are located above the left renal vein near the aorta and lumbar vertebrae.Full Answer >
Calcification is the accumulation of calcium in body tissues. Although this normally occurs in bone formations, it can occur in soft tissue, which causes the tissues to harden. Calcified lymph nodes are found commonly in abdominal x-rays but are asymptomatic and are usually ignored, notes the Radiology Masterclass. Despite this, lymph nodes found in the mediastinal area of the body can be quite dangerous.Full Answer >