Lymph nodes under the arm are known as axillary lymph nodes, and most people have between 20 and 30 of them. These nodes circulate fluid called lymph throughout the body and toward the heart, hence the large amount of them in the chest and underarm area.
Axillary lymph nodes are commonly involved in breast cancer because of their proximity to breast tissue. Involvement of the lymph nodes makes it more likely that cancer spreads to other locations. Lymph node swelling is common. Non-cancer reasons for swelling can include injury, infection, colds and viral infections, such as measles, mumps or mononucleosis. Side effects from medications, such as phenytoin, can also cause swelling.Learn More
Lymph nodes in the chest include the axillary nodes, intercostal nodes, mediastinal nodes, bronchopulmanary nodes, thymus gland, and in women, mammary nodes. Innerbody explains that they are connected to each other and rest of the lymph system by right and left lymphatic ducts, the subclavian trunk and the bronchomediastinal trunk.Full Answer >
Lymph nodes store lymphocytes and function as a filter, trapping foreign substances within their sinuses. Dr. Ananya Mandal explains that lymph fluid contains chemicals, toxins, bacteria, viruses and foreign bodies drained from various tissues. Lymph flows through a lymphatic vessel network and passes through various lymph nodes.Full Answer >
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 >
Swollen lymph nodes mean that there is something amiss in the body, according to the Mayo Clinic. MedlinePlus explains that the lymph nodes may swell due to an infection, an immune or autoimmune condition, cancer or certain medications.Full Answer >