TY - JOUR
T1 - Redundant nerve roots indicate higher degree of stenosis in lumbar spine stenotic patients
AU - Nathani, Karim Rizwan
AU - Barakzai, Muhammad Danish
AU - Rai, Hamid Hussain
AU - Naeem, Komal
AU - Mubarak, Fatima
AU - Iftikhar, Haissan
AU - Khan, Saad Akhtar
AU - Enam, Syed Ather
N1 - Publisher Copyright:
© 2022, The Author(s) under exclusive licence to Belgian Neurological Society.
PY - 2023/10
Y1 - 2023/10
N2 - Objectives: Redundant Nerve Root (RNR) is a tortuous and elongated radiological appearance of cauda equina on Magnetic Resonance Imaging (MRI) in Lumbar Spinal Canal Stenosis (LSCS) patients. This study evaluated preoperative spinal morphometry associated with the development of RNR. Methods: The retrospective cohort was conducted at The Aga Khan University Hospital, and included patients undergoing decompressive spinal surgery secondary to degenerative LSCS in 2015. The patients were divided into two groups with respect to the presence of preoperative RNR. Spinal morphometry was defined by several radiological parameters, including areas of dural sac (DSA), spinal canal, spinal foramen, facets, and spinal joints, and bilateral angles based on vertebral anatomy. Results: A total of 55 patients were enrolled with a mean age of 57.1 years, in which 22 (40%) expressed RNR in their MRI. The RNR group had significantly lower mean DSA (59.64 vs 84.01 mm2; p = 0.028), bilateral posterior facet angle (Right: 33.84 vs 46.21, p = 0.004; Left: 36.43 vs 43.80, p = 0.039) and higher bilateral anterior facet angles (Right: 54.85 vs 44.57, p = 0.026; Left: 55.27 vs 46.36, p = 0.050) compared to the non-RNR group. The other bidimensional and angular parameters did not observe any statistical difference between the two groups. Conclusion: RNR was associated with a higher degree of stenosis in patients with LSCS. Bilateral anterior and posterior facets angles contribute to its development, indicating particular spinal morphology to be vulnerable to the stenotic disease.
AB - Objectives: Redundant Nerve Root (RNR) is a tortuous and elongated radiological appearance of cauda equina on Magnetic Resonance Imaging (MRI) in Lumbar Spinal Canal Stenosis (LSCS) patients. This study evaluated preoperative spinal morphometry associated with the development of RNR. Methods: The retrospective cohort was conducted at The Aga Khan University Hospital, and included patients undergoing decompressive spinal surgery secondary to degenerative LSCS in 2015. The patients were divided into two groups with respect to the presence of preoperative RNR. Spinal morphometry was defined by several radiological parameters, including areas of dural sac (DSA), spinal canal, spinal foramen, facets, and spinal joints, and bilateral angles based on vertebral anatomy. Results: A total of 55 patients were enrolled with a mean age of 57.1 years, in which 22 (40%) expressed RNR in their MRI. The RNR group had significantly lower mean DSA (59.64 vs 84.01 mm2; p = 0.028), bilateral posterior facet angle (Right: 33.84 vs 46.21, p = 0.004; Left: 36.43 vs 43.80, p = 0.039) and higher bilateral anterior facet angles (Right: 54.85 vs 44.57, p = 0.026; Left: 55.27 vs 46.36, p = 0.050) compared to the non-RNR group. The other bidimensional and angular parameters did not observe any statistical difference between the two groups. Conclusion: RNR was associated with a higher degree of stenosis in patients with LSCS. Bilateral anterior and posterior facets angles contribute to its development, indicating particular spinal morphology to be vulnerable to the stenotic disease.
KW - Degenerative spine disease
KW - Redundant nerve root
KW - Spinal anatomy
KW - Spinal stenosis
UR - http://www.scopus.com/inward/record.url?scp=85136780059&partnerID=8YFLogxK
U2 - 10.1007/s13760-022-02040-w
DO - 10.1007/s13760-022-02040-w
M3 - Article
AN - SCOPUS:85136780059
SN - 0300-9009
VL - 123
SP - 1781
EP - 1787
JO - Acta Neurologica Belgica
JF - Acta Neurologica Belgica
IS - 5
ER -