Cervical Lymph Nodes Flashcards
What is the function of a lymph node
Physical filter
Phagocytic filter
Full of lymphocytes (T & B) cells): Activate and proliferate in response to antigens
Lots of inputs but only one output. Sows down flow. Tiime. If lymphocytes active. Eg bc of bacteria virus cancer etc. Node swell
• !ll substances transported in lymph pass through ≥ 1 lymph
node
Where are specific regions in the body where lymph nodes may be palpable
NEck (cervical)
Armpit (axillary)
Groin (femoral)
Nearly 1/2 of all the body’s lymph nodes are found in the ec
What is lymphadenopathy and what ca cause it
Enlarged lymph nodes
- infection
How can lymph nodes be organised
Lymph nodes can be organised into regional (or superficial) and terminal (or deep) groups.
What are superficial (regional) lymph nodes?
Regional lymph nodes drain specific areas and, in the head and neck region, lie superficially within the superficial cervical fascia. As such regional lymph nodes in the head and neck can be readily palpated, when they are enlarged.
What are deep lymph nodes
Terminal lymph nodes lie within the neck, deep to the investing layer of cervical fascia. They are collectively called the deep cervical nodes, and they receive all the lymph from the head and neck, including lymph drained first via the regional groups.
What drains into the deep node \s
Deep tissues of the neck (e.g. larynx, thyroid gland) will drain directly to deep cervical lymph node, pathology in these structures may first present as an enlarged deep cervical node (e.g. laryngeal cancer).
Wahat are the deep nodes closely related t
The deep cervical lymph nodes are closely related to the carotid sheath and, in particular, to the internal jugular vein. Deep to scm
What are the superficial nodes draining the face, scalp and neck
Head: Submental, submandibular, peauricular, postauricular, occipital,
Neck: superficial cervical, posterior cervical, anterior cervical
Seek slide for placement
Where do the superficial nodes draining the face and scalp drain
Nodes in the neck, see slide
Name some deep lymph nodes
Jugulo-digastric
Jugulo-omohyoid
Supraclavicular lymph nodes
What is wanderers ring
An Annular Collection of Lymphoid Tissue Surrounds the Upper Aerodigestive
Describe the jugular-digatric node
The jugulo- digatric node (also called the tonsillar node) is located just below and behind the angle of the mandible and is concerned with lymph drainage of the palatine tonsil, oral cavity and the tongue. It is often swollen and tender in tonsillitis and can also become enlarged in cancers affecting the structures it drains.
Describe the jugular omohyoid node
The jugulo-omohyoid node is mainly associated with the lymph drainage of the tongue, oral cavity, trachea, oesophagus and the thyroid gland. Infection or disease affecting these structures may therefore present with an enlarged jugulo-omohyoid lymph node.
What are the supraclavicular nodes
Another group of deep cervical lymph nodes of particular importance is the supraclavicular nodes found in the root of the neck on either side. These lymph nodes can enlarge in the late stages of malignancies of the abdomen and thorax as they receive the lymph from these areas before it drains via the thoracic duct into the venous circulation.
