Objective: To investigate the involvement of level I neck lymph node groups in head and neck carcinoma and compare the effect of primary tumor sites, such as oral cavity (OC), oropharynx (OP), hypopharynx (HP), and larynx (Lx), on level I lymph node metastasis.
Study Design: Case series with chart review.
Setting: Comprehensive Cancer Center.
Subjects And Methods: A total of 243 patients with OC and laryngopharyngeal carcinoma who underwent neck dissections in the last three years were included in the study. The primary tumor site was OC, followed by OP, Lx, HP, and carcinoma of unknown primary (CUP).
Results: Level I was involved in 29 of 243 (11.9%) patients. The other levels were also positive in all but five (17.2%) level I-involved patients. The primary tumor site with level I lymph node metastasis was OC (19.1%), followed by CUP (11.1%), OP (9.8%), Lx (4.4%), and HP (0%). The Lx primary site involved level I only if there were multiple other adverse prognostic features, such as N3 neck, extracapsular spread, pathologic involvement of all resected lymph nodes, involvement of all levels I-V, and invasion of the submandibular gland.
Conclusion: Although the submandibular content is resected as part of radical and modified radical neck dissections, level I-sparing selective neck dissections could be a safe and effective surgical neck management strategy in appropriately selected patients with OP, Lx, and HP carcinoma.
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