目的  感觉异常性股痛(MP)常由股外侧皮神经(LFCN)的机械嵌压引起，通常发生在股外侧皮神经走行至髂前上棘的部位。MP最佳手术治疗方法有待确定，部分原因是LFCN周围筋膜平面的精细结构尚未阐明。本研究的目的是利用生物塑化和超声确定LFCN在髂前上棘附近的筋膜结构。  方法  选择11具尸体（6名女性，5名男性， 38～97岁）制作薄层生物塑化切片。对34名健康志愿者（19名女性，15名男性，20～62岁）进行LFCN超声评估。  结果  LFCN在腹内斜肌筋膜纤维和髂筋膜之间出骨盆，然后在缝匠肌表面和位于髂前上棘（ASIS）下方的阔筋膜张肌之间走行。在缝匠肌和阔筋膜张肌之间，LFCN走行在独立封闭的筋膜鞘中。  结论  LFCN在髂前上棘处位于腹内斜肌腱膜内。LFCN在缝匠肌表面及外侧走行至大腿前外侧区域。超声定位LFCN有助于外科手术。

Objective  Meralgia paresthetica(MP) is commonly caused by mechanical entrapment of the lateral femoral cutaneous nerve (LFCN). The entrapment often occurs at the site where the nerve exits the pelvis. Its optimal surgical management remains to be established, partly because the fine architecture of the fascial planes around the lateral femoral cutaneous nerve has not been elucidated. The purpose of this study is to determine the fascia structure of lateral femoral cutaneous nerve nearby the anterior superior iliac spine using anatomy and ultrasound technique.   Methods  Eleven cadavers were selected for plastination (6 female, 5 male, age range 38-97 years). Ultrasonography was performed on 34 healthy volunteers (19 women, 15 men, age range, 20-62 years).   Results  The lateral femoral cutaneous nerve exited the pelvis via a tendinous canal within the internal oblique-iliac fascia septum,and then between the sartorius muscle surface and the tensor fascia lata muscle located below the anterior superior iliac spine (ASIS). and then ran between the sartorius muscle and the tensor fascia.   Conclusion  Lateral femoral cutaneous nerve is located in the aponeurosis of the intra-abdominal oblique muscle at the pelvic outlet. Lateral femoral cutaneous nerve travels on the surface and outside of the sartorius muscle. These two segments of lateral femoral cutaneous nerve can be localized by ultrasound scans.