A lump behind the ear can have many potential causes, including acne, cysts, and infections. Swollen lymph nodes and certain cancers can also cause lumps. It is best to contact a doctor for advice if ...

Preauricular lymph nodes, which are located in front of your ears, can sometimes become swollen and painful. Common causes include an ear or tooth infection. Treatment can depend on the underlying ...

Surgery or radiation therapy of metastatic cancer often damages lymph nodes, leading to secondary lymphedema. Here we show, using a newly established mouse model, that collecting lymphatic vessels can ...