Classification of variabilities of the spinal nerve roots (historical overview and perspective)
Classification of variabilities of the spinal nerve roots (historical overview and perspective)

Summary/Abstract: Introduction: Variabilities of spinal nerve roots have attracted the attention of researchers since the second half of the last century. The interest in them was raised mainly by the failure of the intervertebral disc herniation operations due to the frequent finding of anomalies of the spinal nerve root exits, mainly in the lumbosacral region. Many of them were not detected by preoperative imaging examinations. Historical overview: Operative, radiographic, and anatomical studies used several classification systems to classify their findings, which made it difficult to compare them with each other. The classification systems according to Neidre and MacNab, Postacchini et al. and Kadish and Simmons were most often used. In 2020, we also proposed a classification system, unifying the aforementioned three previous classification systems. Perspective: In 2021 Nikolenko et al. proposed a new simple unifying classification system of spinal root variabilities. Practice will show which system will be used next.

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