喉及下咽鳞癌易于颈淋巴结转移 ,局限于此主要取决于原发病灶的部位。颈淋巴结的五个解剖区域引伸定义出标准化颈淋巴结群的转移扩散危险性 , 区包括颏下及颌下三角。该复习资料考虑到这些三角在颈清扫中的作用 ,除非有明确扩散证据 ,包括 区的颈清扫是多余的 ,因为该区淋巴结并不真有转移危险 ,因此 ,SLND在喉及下咽鳞癌中起重要作用 Laryngeal and swallowing squamous cell carcinoma of cervical lymph node metastasis, confined to this mainly depends on the site of the primary lesion. The five anatomical extensions of cervical lymph nodes define the risk of metastatic spread to normalized cervical lymph node clusters, including the submental and submandibular trigones. This review considers the role of these triangles in neck dissection and unless clear disseminated evidence is available, including neck dissection is superfluous because there is no real risk of metastasis in the lymph nodes of the area, so SLND is present in both laryngeal and hypopharyngeal squamous carcinomas makes an important impact