History and evolution of the far-lateral approach in neurosurgery

The far-lateral approach (FLA) to the foramen magnum, lower clivus, and craniovertebral junction has become a cornerstone in accessing these regions. Historically, lesions arising at the ventral craniovertebral junction posed significant surgical challenges because of limited visualization, poor exposure or considerable brainstem retraction, and high complication rates with midline posterior and anterior transoral approaches. To overcome these limitations, early pioneers proposed the FLA, which extended the lateral suboccipital exposure and enabled controlled drilling of the occipital condyle, thereby offering a more direct, tangential route to anterior brainstem lesions. This approach has undergone technical refinements such as alternative skin incisions to improve closure, consistent resection of the posterior arch of C1, posterior fossa decompression with condyle and jugular tubercle drilling in select cases for expanded access, vertebral artery transposition, and endoscope-assisted visualization. These enhancements have improved exposure while minimizing brain retraction and preserving critical neurovascular structures. The FLA has also evolved into distinct anatomical variants-most notably the transcondylar, supracondylar, and paracondylar extensions-offering dynamic exposure tailored to the pathology and anatomical nuances of the case. Quantitative anatomical studies have further supported the concept that these variants function as modular exposure corridors that can be selected according to lesion location and direction of extension. Originally developed to access vertebral artery aneurysms, the FLA has since demonstrated utility across a spectrum of pathologies, including meningiomas, chordomas, schwannomas, and complex vascular malformations. Compared with traditional midline and transoral approaches, it offers superior access to ventrolateral lesions, with low rates of postoperative instability and complications in experienced hands. Today, the FLA is considered essential in skull base and spinal neurosurgery. Ongoing advancements, such as endoscopic augmentation, neuronavigation, and patient-specific preoperative modeling, continue to refine this technique. This review outlines the anatomical and technical evolution of the FLA and highlights landmark contributions that have shaped its role in contemporary neurosurgical practice.