在我们的经验中，颈内动脉前鞘在切除颞骨区域癌症时形成了重要的解剖层面。然而，它的解剖结构、相关关系和放射学表现仍然不清楚。我们解剖了八侧尸体头部，并将解剖发现与高分辨率基线T1 MRI相关联。颈内动脉前鞘由张肌-血管-支点筋膜、咽喉支筋膜、颊咽筋膜（BPF）和长头肌筋膜（LCF）形成，并在MRI上呈现为低信号线。前所未有的是，舌咽神经穿过鞘，距颅底9.0毫米（标准偏差2.1毫米），通过其LCF和BPF层靠近咽喉出口。在颅底处，多个筋膜层构成了颈内动脉前鞘，并且在放射学上可以识别。需要进一步研究来验证发现，并调查这个筋膜层在形成有效的防止恶性肿瘤扩散的屏障中扮演的角色。 ©2023作者。Head & Neck由Wiley Periodicals LLC出版。

In our experience, the anterior carotid sheath forms an important plane of dissection when excising temporal bone region cancers. However, its anatomical composition, relationships, and radiological appearance remains unclear.Eight sides of cadaveric heads were dissected. Anatomical findings were correlated with a high-resolution baseline T1 MRI.The anterior carotid sheath was formed by the tensor-vascular-styloid fascia, stylopharyngeal fascia, buccopharyngeal fascia (BPF), and longus capitis fascia (LCF), and appeared as a hypointense line on MRI. Not previously described, the glossopharyngeal nerve pierced the sheath 9.0 mm (SD 2.1 mm) below the skull base and traveled through its LCF and BPF layers to exit near the pharynx.Multiple fascial layers formed the anterior carotid sheath at the skull base, and this was radiologically identifiable. Further studies are required to validate findings and investigate the role this fascial plane has in forming an effective barrier to spread of malignancy.© 2023 The Authors. Head & Neck published by Wiley Periodicals LLC.