Lymph node metastasis occurs in "metastatic" lymph nodes, lymph nodes that have been infected by cancer from elsewhere in the body. A part of the immune system, lymph nodes are tiny ovals placed ...

When the body fights an infection or injury, lymph nodes sometimes swell. Doctors call this a reactive lymph node. Treatment can depend on the cause. Lymph nodes house white blood cells. These cells ...

Swollen lymph nodes in the armpit may indicate an infection, injury, or disease that requires medical attention. However, it’s usually not a sign of cancer. Lymph nodes are critical parts of the ...