Mastoid lymph nodes

Lymph nodes located in the mastoid region of the skull

Mastoid lymph nodes

Latin	nodi lymphoidei mastoidei
System	Lymphatic system

The mastoid lymph nodes (also known as the posterior auricular lymph nodes) are a group of lymph nodes located in the mastoid process region of the temporal bone of the skull. These lymph nodes are part of the lymphatic system and play a crucial role in the body's immune system by filtering lymphatic fluid and trapping pathogens.

Anatomy

The mastoid lymph nodes are situated behind the ear, near the mastoid process of the temporal bone. They are typically small and can vary in number. These lymph nodes receive lymphatic drainage from the posterior part of the scalp, the auricle (external part of the ear), and the external auditory canal.

Function

The primary function of the mastoid lymph nodes is to filter lymphatic fluid, which contains white blood cells, cellular debris, and pathogens. By trapping and destroying harmful substances, these lymph nodes help to prevent infections and maintain overall health.

Clinical significance

Enlargement of the mastoid lymph nodes can occur due to various conditions, including infections, inflammation, and malignancies. Common causes of lymph node enlargement in this region include otitis externa, otitis media, and mastoiditis. In some cases, the enlargement may be a sign of more serious conditions such as lymphoma or metastatic cancer.

Related structures

The mastoid lymph nodes are part of a larger network of lymph nodes in the head and neck region, including the preauricular lymph nodes, submandibular lymph nodes, and deep cervical lymph nodes. These nodes work together to filter lymphatic fluid from different parts of the head and neck.

See also

• Lymphatic system
• Lymph node
• Mastoid process
• Temporal bone
• Immune system