Introduction: Nerve root anomalies (NRAs) are a set of well-described congenital irregularities for which several classification systems have been devised over the years.
Conclusion: This comprehensive review examines the anatomy and characteristics of NRAs; their surgical, radiographic, and cadaveric prevalence rates; clinical and radiographic presentations; and surgical management. In addition, the top 5 NRA classification systems are presented and related.
Keywords: Anatomy; Duplicated; Imaging; Spinal nerve; Spine; Variations.