What is the term for the inflammation of the lymph nodes?

The term for the inflammation of the lymph nodes is lymphadenitis. This condition occurs when the lymph nodes, which are essential components of the immune system responsible for filtering pathogens and responding to infections, become swollen and tender due to various underlying causes such as infections, autoimmune diseases, or malignancies. Lymphadenitis can present with symptoms such as pain in the affected area, fever, and swelling.

Lymphoma, the first option, refers to a type of cancer that originates in the lymphatic system, which is different from simply inflammation of the lymph nodes. Measles is a viral infection that causes a specific set of symptoms, including a characteristic rash and fever, but it does not refer to lymph node inflammation. Influenza is another viral infection, commonly known as the flu, that primarily affects the respiratory system and again does not pertain to lymph node inflammation. Thus, lymphadenitis is the precise term used to describe the inflammation of lymph nodes.