Abstract：Objective To study the anatomy landmark of great auricular nerve, and to provide anatomical documentation to surgeries of parotid region.Methods Fifty-two cases of great auricular nerve with parotid region surgery were chosen from November 2010 to October 2013 in the First Affiliated Hospital of Anhui Medical University. The location of muscle exit point, path, bifurcation, branches and the relation with external jugular vein of the great auricular nerve were observed. In 52 cases, there were 25 cases of radical neck dissection (32 sides), 4 cases of malignant tumor of parotid gland, and 16 cases of parapharyngeal space tumor.Results The exit point of great auricular nerve through cleidomastoidal was mostly located within 10 mm of the middle of the posterior border of cleidomastoidal (49/52, 94.2%), most of them with one stem and separated into three branches at the anterior border of cleidomastoidal, the tail of parotid gland and 10 mm inferior of mandibular angle. The great auricular nerve was located behind external jugular vein and they are parallel. The space between them was less than 20 mm.Coclusions The variations of the great auricular nerve are very common, but the relationship with the external jugular vein is close, we can locate the great auricular nerve by the anatomic landmarks, and avoid the injury of the great auricular nerve.
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