Learning Objective: Describe the lymphatic vessels, lymph node groups, and clinical relevance of the lymphatic drainage of the head and neck.

The lymphatic system of the head and neck consists of a network of vessels and nodes that remove excess interstitial fluid, filter pathogens, and return lymph to the venous circulation.

Lymphatic Vessels

Lymphatic vessels are divided into superficial and deep groups.

Superficial Vessels

These vessels drain the scalp, face, and neck. All superficial lymph ultimately enters the superficial ring of lymph nodes at the head–neck junction.

Deep Vessels

Deep lymphatic vessels originate from the deep cervical lymph nodes and form the two key lymphatic trunks:

Left jugular lymphatic trunk → drains into the thoracic duct, which enters the venous system at the left subclavian vein
Right jugular lymphatic trunk → drains into the right lymphatic duct, entering the venous system at the right subclavian vein

Activity

Lymph Nodes

Lymph nodes of the head and neck are grouped into:

Superficial ring of lymph nodes
Deep cervical lymph nodes (vertical chain)

Superficial Lymph Nodes

They form a ring extending from the chin to the posterior scalp. All superficial nodes drain into the deep cervical nodes.

Occipital nodes:

1–3 nodes at the lateral border of trapezius; drain the posterior scalp.

Mastoid (post-auricular) nodes:

Posterior to the ear; drain the posterior neck, upper ear, and external auditory meatus.

Pre-auricular nodes:

1–3 nodes anterior to the ear; drain the superficial face and the temporal region.

Parotid nodes:

Superficial and deep groups; drain the nose, lateral orbit, external acoustic meatus, tympanic cavity, and nasopharynx.

Submental nodes:

Superficial to mylohyoid; drains the central lower lip, floor of mouth, and apex of tongue.

Submandibular nodes:

3–6 nodes in the submandibular triangle; drain cheeks, lips, lateral nose, gums, and anterior tongue; receive lymph from submental and facial nodes.

Facial nodes:

Maxillary, buccinator, and supramandibular; drain the nasal and cheek mucosa, eyelids, and conjunctiva.

Superficial cervical nodes:

Anterior group near the anterior jugular vein. Posterior lateral group near the external jugular vein. Drain superficial surfaces of the neck.

Deep Cervical Lymph Nodes

All lymph from the head and neck drains directly or indirectly into this chain. They lie close to the internal jugular vein in the carotid sheath. They include:

Prelaryngeal,
Pretracheal,
Paratracheal,
Retropharyngeal,
Infrahyoid,
Jugulodigastric (tonsillar),
Jugulo-omohyoid, and
Supraclavicular nodes.

Efferent vessels form the jugular lymphatic trunks.

Activity

Clinical Relevance

Virchow’s Node

This left supraclavicular lymph node receives lymph from the abdominal cavity.

Enlargement is known as Troisier’s sign
Strongly associated with gastric carcinoma metastasis

Waldeyer’s Ring

A circular arrangement of lymphoid tissue surrounding the superior pharynx. It responds to inhaled and ingested pathogens.

Components:

Lingual tonsil – posterior tongue
Palatine tonsils – between the palatoglossal and palatopharyngeal arches
Tubal tonsils – near Eustachian tube openings
Pharyngeal tonsil (adenoid) – roof of nasopharynx

Inflamed Palatine Tonsils (Tonsillitis)

Acute tonsillitis causes erythematous, enlarged tonsils and tender jugulodigastric nodes.

Chronic tonsillitis → may require tonsillectomy
Bleeding during tonsillectomy usually occurs from:
- External palatine vein (primary)
- Tonsillar branch of the facial artery (secondary)
Spread of infection may cause peritonsillar abscess (quinsy) → uvular deviation and airway risk → emergency drainage and antibiotics

Lymphatics of the Brain

Previously thought absent, lymphatic vessels have now been identified in the meninges, draining cerebrospinal fluid and interstitial fluid toward cervical nodes.