Lymph nodes of the perimandibular area: from anatomical classification to pathological role in cancer of the oral cavity, oropharynx and skin

Abstract

Lymph node status of the neck is the most important prognostic factor in head and neck cancer. Neck dissection, which consists of the systematic excision of the neck nodes, represents the gold standard of surgical treatment in clinically positive necks. In cases in which metastases to lymph nodes of the neck are not detectable, the decision to perform an elective neck dissection depends on the stage and the site of the primary tumor. This narrative review focuses on the anatomical description and oncological role of a group of lymph nodes of the neck that historically has not been well defined. Over the years, several authors have described the groups of lymph nodes that lie where the facial vein crosses the mandible, but to date, no unique definition or a clear view of their oncological role has been proposed. Recently, the term “perimarginal nodes” was coined to refer to this group of lymph nodes, and emphasis was placed on the risk of leaving them undissected during neck dissection. This paper aims to provide a surgical-anatomical classification of these lymph nodes and describe their oncological role on the basis of a review of the relevant literature.

Keywords

Perimarginal nodes / perifacial nodes / submandibular nodes / Hayes Martin maneuver / facial vein / neck dissection / level IB / submandibular triangle

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