01/18/2026
๐ฅถ๐ฅถ๐ฅถ ๐ฅถ๐ฅถ๐ฅถ ๐ฅถ๐ฅถ๐ฅถ
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๐๐ผ๐ฒ๐ ๐๐ต๐ฒ ๐ฆ๐ถ๐๐ฒ ๐ผ๐ณ ๐๐ฒ๐ฟ๐๐ถ๐ฐ๐ฎ๐น ๐๐ถ๐๐ฐ ๐๐ฒ๐ฟ๐ป๐ถ๐ฎ๐๐ถ๐ผ๐ป ๐๐ณ๐ณ๐ฒ๐ฐ๐ ๐๐น๐ถ๐ป๐ถ๐ฐ๐ฎ๐น ๐ฃ๐ฎ๐ฟ๐ฎ๐บ๐ฒ๐๐ฒ๐ฟ๐ ๐ถ๐ป ๐๐ฒ๐ฟ๐๐ถ๐ฐ๐ฎ๐น ๐ฅ๐ฎ๐ฑ๐ถ๐ฐ๐๐น๐ผ๐ฝ๐ฎ๐๐ต๐
Cervical radiculopathy is a common clinical condition characterized by neck pain and radiating arm symptoms, most frequently caused by cervical disc herniation. Epidemiological studies estimate its prevalence at approximately 5โ6 per 1,000 individuals, with disc-related nerve root irritation being a major underlying mechanism (https://pubmed.ncbi.nlm.nih.gov/32710604/, https://pubmed.ncbi.nlm.nih.gov/8186959/). Traditionally, symptom severity and treatment decisions have been assumed to correlate with the degree of mechanical nerve root compression visible on magnetic resonance imaging (MRI). However, increasing evidence suggests that inflammatory and neuroimmune processes may play an equally important, if not dominant, role in the development and persistence of radicular symptoms (https://pubmed.ncbi.nlm.nih.gov/17204882/, https://pubmed.ncbi.nlm.nih.gov/24614255/). Despite the widespread use of MRI in clinical decision-making, the prognostic value of disc herniation size remains uncertain.
๐ Against this background, a brand-new multicentre retrospective cohort study by Gรผl and colleagues (https://pubmed.ncbi.nlm.nih.gov/41464802/) examined whether the size of cervical disc herniation influences clinical presentation and one-year outcomes in patients with cervical radiculopathy.
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The analysis combined data from two well-established prospective trials: the NECK trial (https://pubmed.ncbi.nlm.nih.gov/30583108/), which focused on surgically treated patients undergoing anterior cervical discectomy with or without implants, and the CASINO trial (https://pubmed.ncbi.nlm.nih.gov/40528016/), which compared surgical and conservative management strategies. In total, 206 patients with MRI-confirmed cervical disc herniation were included.
๐ Baseline MRI scans were used to classify disc herniations according to their size. Due to small subgroup numbers, herniations were dichotomised into โsmallโ (slight bulging or small herniation) and โlargeโ (moderate or severe herniation, pro/extrusion with less than ยผ of the canal and severe herniation with pro/extrusion more than ยผ of the canal). Clinical outcomes were assessed at baseline and after one year using validated measures, including the Neck Disability Index (NDI), Visual Analogue Scale (VAS) scores for arm and neck pain, and the EuroQol Visual Analogue Scale (EQ-VAS).
๐ The results demonstrated no significant association between disc herniation size and baseline symptom severity across all clinical parameters (OR 1.010, p = 0.323). Furthermore, herniation size did not predict clinical outcomes at one year, regardless of whether patients were treated surgically or conservatively. Improvements in pain, disability, and self-perceived health were observed in both treatment groups, but these improvements were independent of the initial size of the disc herniation.
๐ก This finding reinforces the idea that symptom progression may primarily be driven by immunological processes, rather than mechanical compression. Neuroinflammatory mechanisms are increasingly recognised to play a key role in the pathogenesis and the clinical course of radiculopathy. The majority of high-quality studies on neuroinflammation and disc herniation have focused on the lumbar spine (https://pubmed.ncbi.nlm.nih.gov/35357731/, https://pubmed.ncbi.nlm.nih.gov/38900144/, https://pubmed.ncbi.nlm.nih.gov/32169419/) resulting in a relative scarcity of cervical-specific data. Nonetheless, it is hypothesised that similar neuroimmune and biomechanical mechanisms underlie both lumbar and cervical radiculopathy.
Illustration: https://www.nejm.org/doi/full/10.1056/NEJMcp043887
