在解剖一例左侧女性童尸头颈标本时,发现左侧颈外静脉下段形成岛状,在剥离颈润肌则见该肌外观形态完整无肌纤维断裂,露出颈深筋膜浅层和颈外静脉。修洁该静脉下段时发现有岛状形成。该岛状约在锁骨上缘4cm 处,为呈纵行的裂隙,长约0·5cm.其中充以结缔组织,在其上端后外方有锁骨上神经外侧部分通过。在距岛状结构下端0.8cm.即为胸锁乳突肌 Anatomy of a female left cadaveric head and neck specimens and found that the lower part of the left external jugular vein island formation, peeling in the neck and neck muscle, the appearance of the muscle morphology of the complete absence of muscle fiber rupture, revealing the deep superficial cervical fascia and jugular vein . Repair of the lower veins found when island formation. The island is about 4cm at the upper edge of the clavicle and is a longitudinal cleft with a length of about 0.5cm. The connective tissue is filled with connective tissue and the lateral part of the supraclavicular nerve passes through the upper part of the island. 0.8cm from the bottom of the island-shaped structure is the sternocleidomastoid muscle