Definition of medical terms used on the web.

Lymph Node

Each of multiple oval structures that are found throughout the lymphatic system, most grouped in specific areas: mouth, neck, axilla, and groin. They may have different sizes and in them are formed the different blood cells, all responsible for fighting infections. In some cases, it is used to diagnose the different stages of a disease, so it may require performance of a biopsy of the lymph node.