Sahoo Sanjukta, Kumar Kc Pradheep, Narayan Ravi K
Anatomy, All India Institute of Medical Sciences, Bhubaneswar, IND.
Cureus. 2024 Jun 5;16(6):e61763. doi: 10.7759/cureus.61763. eCollection 2024 Jun.
The genitofemoral nerve (GFN) presents with a variable course in nearly half of the population. This variation can be seen in its availability, course, and branching. Here, a notable case during a cadaveric dissection revealed an unusually high bifurcation of the GFN on the left side, contrasting with the typical bifurcation observed on the right. This divergence was highlighted using colored markers to aid educational visualization, facilitating a comprehensive learning experience about the nerve's variability and its functional implications, such as the cremasteric reflex. Embryologically, these variations stem from the migratory paths of myotomes during development, influenced by extrinsic signals and growth factors. Despite the high incidence of anatomical variability, the muscular structure remains consistent, suggesting that the nerve's formation is more susceptible to developmental shifts than the muscles it innervates. Clinically, understanding GFN variations is crucial due to the nerve's involvement in conditions like genitofemoral neuropathy, which can arise from surgical procedures. Accurate knowledge of these variations aids in precise diagnostic and therapeutic interventions, reducing complications, and enhancing patient outcomes in lower abdominal and groin surgeries. However, further research is needed to elucidate the exact embryological and genetic underpinnings of these variations.
在近半数人群中，生殖股神经（GFN）走行多变。这种变异可见于其行径、走行过程及分支情况。在此，一具尸体解剖过程中的一个显著病例显示，左侧生殖股神经出现异常高位分叉，与右侧观察到的典型分叉形成对比。使用彩色标记突出这种差异以辅助教学可视化，有助于全面了解该神经的变异性及其功能影响，如提睾反射。从胚胎学角度来看，这些变异源于发育过程中肌节的迁移路径，受外部信号和生长因子影响。尽管解剖变异发生率很高，但肌肉结构保持一致，这表明神经的形成比其支配的肌肉更容易受到发育变化的影响。临床上，了解生殖股神经变异至关重要，因为该神经涉及如生殖股神经病变等情况，这些情况可能由外科手术引起。准确了解这些变异有助于进行精确的诊断和治疗干预，减少并发症，并改善下腹部和腹股沟手术的患者预后。然而，需要进一步研究以阐明这些变异的确切胚胎学和遗传学基础。
