The unconventional T cells (green), which have migrated from the tissue via the lymphatic channels, are located in the marginal sinus and in the interfollicular zone. Follicular B cells are shown in ...

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 ...

If you’ve ever felt swelling on the side of your neck, you probably had swollen glands, also known as swollen lymph nodes. Doctors call it lymphadenopathy. Swollen lymph nodes are a sign that your ...