Mastoid lymph node
System
Immune/Lymphatic
Mastoid lymph node
Definition
The mastoid lymph nodes (retroauricular lymph nodes, posterior auricular glands), usually two in number, are situated on the mastoid insertion of the Sternocleidomastoideus, beneath the Auricularis posterior. Their afferent vessels drain the posterior part of the temporoparietal region, the upper part of the cranial surface of the auricula or pinna, and the back of the external acoustic meatus; their efferents pass to the superior deep cervical glands.
Also known as mastoid node, postauricular lymph node, retro-auricular lymph node, retro-auricular node — per UBERON
The Mastoid lymph node is a part of the Immune/Lymphatic.