颈淋巴清扫术中识别和保护面神经下颌缘支,是一个十分重要的步骤,但解剖学书籍中缺少对下颌缘支位置的精确描述。Dingman和Grabb通过100侧尸面解剖发现,81％的下颌缘支,整个行程位于下颁骨下缘上方,只有19％在下颌角处位于下颌骨上方,所有下颌缘支均居下颁骨体的上方,面静脉的浅面。与此相反,Baker和Conley认为,临床上几乎所有患者的下颌 Identifying and protecting the facial mandibular branch of the facial nerve in cervical lymphadenectomy is a very important step, but anatomical books lack an accurate description of the location of mandibular margins. Dingman and Grabb found that 81% of the mandibular margins were located on the lower edge of the lower extremity with only 19% at the mandibular angle, and all the mandibular margins were found in the lower extremity Above the surface of the superficial vein. In contrast, Baker and Conley argue that the jaw of almost any patient in the clinic