The preauricular lymph nodes sit just in front of the ears. These tiny nodes play a vital role in the immune system. In this article, we provide information on the preauricular lymph nodes PLNs and other parts of the lymphatic system. The PLNs are a group of lymph nodes that sit just in front of the ears. These lymph nodes filter lymph fluid as it arrives from the scalp, neck, and various parts of the face.
What causes lymphadenitis?
Lymph nodes are filled with white blood cells that help your body fight infections. When lymph nodes become infected, it's usually because an infection started somewhere else in your body. Rarely, lymph nodes can enlarge due to cancer. You have about lymph nodes in your body, but normal lymph nodes may only be felt below your jaw, under your arms, and in your groin area. A normal lymph node is small and firm. When lymph nodes become infected, they usually increase in size, become tender, and may be felt in other areas of your body during a physical exam. Infections that spread to lymph nodes are usually caused by bacteria, a virus, or a fungus. It is important to learn how the infection spread into your lymph nodes so that the right treatment can be started.
Test your knowledge
A 55 year old male patient reported in the department of oral and maxillofacial surgery with a chief complaint of swelling on right side of face from last 2 months. He reported a progressive increase in the swelling. Pain and discomfort was present from last 7 days with increased swelling, and reduced mouth opening. On examination, the face appeared asymmetrical with a swelling in the right cheek which was small, smooth, dome shaped, present approximately 1. Overlying skin was of normal colour. The patient was afebrile.
Lymph nodes are small glands that filter lymph, the clear fluid that circulates through the lymphatic system. They become swollen in response to infection and tumors. Lymphatic fluid circulates through the lymphatic system, which is made of channels throughout your body that are similar to blood vessels. The lymph nodes are glands that store white blood cells. White blood cells are responsible for killing invading organisms. The lymph nodes act like a military checkpoint.