 Cervical lymph nodes are subject to a number of different pathological conditions including tumours, infection and inflammation.There are approximately 300 lymph nodes in the neck, and they can be classified in a number of different ways.The classification of the cervical lymph nodes is generally attributed to Henri Rouvière in his 1932 publication "Anatomie des Lymphatiques de l'Homme" Rouviere described the cervical lymph nodes as a collar which surrounded the upper aerodigestive tract, consisting of submental, facial, submandibular, parotid, mastoid, occipital and retropharyngeal nodes, together with two chains that run in the long axis of the neck, the anterior cervical and postero-lateral cervical groups.