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Levi R, Battaglia M, Garoli F, Cappellini LA, De Robertis M, Anselmi L, Savini G, Riva M, Fornari M, Grimaldi M, Politi LS. Quantification of cauda equina nerve root dispersion through radiomics features in weight-bearing MRI in normal subjects and spinal canal stenosis patients. Eur Radiol 2024; 34:4585-4595. [PMID: 38057593 DOI: 10.1007/s00330-023-10467-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 09/26/2023] [Accepted: 10/16/2023] [Indexed: 12/08/2023]
Abstract
OBJECTIVE To quantify the distribution of cauda equina nerve roots in supine and upright positions using manual measurements and radiomics features both in normal subjects and in lumbar spinal canal stenosis (LSCS) patients. METHODS We retrospectively recruited patients who underwent weight-bearing MRI in supine and upright positions for back pain. 3D T2-weighted isotropic acquisition (3D-HYCE) sequences were used to develop a 3D convolutional neural network for identification and segmentation of lumbar vertebrae. Para-axial reformatted images perpendicular to the spinal canal and parallel to each vertebral endplate were automatically extracted. From each level, we computed the maximum antero-posterior (AP) and latero-lateral (LL) dispersion of nerve roots; further, radiomics features were extracted to quantify standardized metrics of nerve root distribution. RESULTS We included 16 patients with LSCS and 20 normal subjects. In normal subjects, nerve root AP dispersion significantly increased from supine to upright position (p < 0.001, L2-L5 levels), and radiomics features showed an increase in non-uniformity. In LSCS subjects, in the upright position AP dispersion of nerve roots and entropy-related features increased caudally to the stenosis level (p < 0.001) and decreased cranially (p < 0.001). Moreover, entropy-related radiomics features negatively correlated with pre-operative Pain Numerical Rating Scale. Comparison between normal subjects and LSCS patients showed a difference in AP dispersion and increase of variance cranially to the stenosis level (p < 0.001) in the upright position. CONCLUSIONS Nerve root distribution inside the dural sac changed between supine and upright positions, and radiomics features were able to quantify the differences between normal and LSCS subjects. CLINICAL RELEVANCE STATEMENT The distribution of cauda equina nerve roots and the redundant nerve root sign significantly varies between supine and upright positions in normal subjects and spinal canal stenosis patients, respectively. Radiomics features quantify nerve root dispersion and correlates with pain severity. KEY POINTS • Weight-bearing MRI depicts spatial distribution of the cauda equina in both supine and upright positions in normal subjects and spinal stenosis patients. • Radiomics features can quantify the effects of spinal stenosis on the dispersion of the cauda equina in the dural sac. • In the orthostatic position, dispersion of nerve roots is different in lumbar spinal stenosis patients compared to that in normal subjects; entropy-related features negatively correlated with pre-operative Pain Numerical Rating Scale.
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Affiliation(s)
- Riccardo Levi
- Department of Biomedical Sciences, Humanitas University, 20072, Pieve Emanuele, Italy
- Department of Neuroradiology, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Massimiliano Battaglia
- Department of Biomedical Sciences, Humanitas University, 20072, Pieve Emanuele, Italy
- Department of Neuroradiology, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Federico Garoli
- Department of Biomedical Sciences, Humanitas University, 20072, Pieve Emanuele, Italy
- Department of Neuroradiology, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Luca Alessandro Cappellini
- Department of Biomedical Sciences, Humanitas University, 20072, Pieve Emanuele, Italy
- Department of Neuroradiology, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Mario De Robertis
- Department of Biomedical Sciences, Humanitas University, 20072, Pieve Emanuele, Italy
- Department of Neurosurgery, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Leonardo Anselmi
- Department of Biomedical Sciences, Humanitas University, 20072, Pieve Emanuele, Italy
- Department of Neurosurgery, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Giovanni Savini
- Department of Biomedical Sciences, Humanitas University, 20072, Pieve Emanuele, Italy
- Department of Neuroradiology, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Marco Riva
- Department of Biomedical Sciences, Humanitas University, 20072, Pieve Emanuele, Italy
- Department of Neurosurgery, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Maurizio Fornari
- Department of Neurosurgery, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Marco Grimaldi
- Department of Neuroradiology, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy
| | - Letterio S Politi
- Department of Biomedical Sciences, Humanitas University, 20072, Pieve Emanuele, Italy.
- Department of Neuroradiology, IRCCS Humanitas Research Hospital, 20089, Rozzano, Italy.
- Department of Biomedical Sciences, Humanitas University, Via R. Levi Montalcini 4, 20072, Pieve Emanuele, Milan, Italy.
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Ding S, Chen L, Fu C, Liu M, Yuan Y, Battié MC, Wang Y. Lumbar foraminal stenosis was associated with back pain and leg pain: epidemiological evidence from a population-based cohort. Neuroradiology 2024:10.1007/s00234-024-03391-2. [PMID: 38871880 DOI: 10.1007/s00234-024-03391-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 05/30/2024] [Indexed: 06/15/2024]
Abstract
OBJECTIVES To determine the characteristics of lumbar foraminal stenosis (LFS) on magnetic resonance (MR) images and their association with back pain and radiating leg pain in a population-based sample of Chinese subjects. METHODS This study was an extension of the Hangzhou Lumbar Spine Study, a cross-sectional study focusing on back pain and lumbar spine MR imaging findings. Questionnaire data, including demographics, lifestyle, occupational exposures, back pain and radiating leg pain were included. On lumbar spine MR images, disc degeneration was assessed using Pfirrmann grade and Modic changes were evaluated. Using Lee's scale, the L3-S1 intervertebral foramina were evaluated, with grade 2-3 representing substantial LFS and grade 0-1 no LFS. Characteristics of LFS were noted, and associations of LFS with back pain and radiating leg pain were examined. RESULTS Among the 644 study subjects, 141 (21.9%) had at least one LFS, and its occurrence was associated with greater age (OR = 1.93 for each 10 years, p < 0.001). Substantial LFS was associated with the presence of back pain (OR = 1.92, p = 0.001) and the intensity of the worst back pain (Coef = 8.30, p < 0.001) over the past 12 months, and disabling back pain during their lifetime (OR = 2.25, p < 0.001). Substantial LFS was also associated with leg pain (OR = 14.27, p < 0.001), with a sensitivity of 75.7% for the presence of radiating leg pain and a specificity of 81.4%. CONCLUSION Substantial LFS on MR images was a common age-related degenerative phenotype in adults, and appears to be an independent risk factor for back pain and leg pain.
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Affiliation(s)
- Shuchen Ding
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, 79# Qingchun Road, Hangzhou, Zhejiang, 310003, China
- Center of Orthopedics, The 903rd Hospital of People's Liberation Army, Hangzhou, Zhejiang, China
| | - Lunhao Chen
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, 79# Qingchun Road, Hangzhou, Zhejiang, 310003, China
| | - Chudi Fu
- Center of Orthopedics, The 903rd Hospital of People's Liberation Army, Hangzhou, Zhejiang, China
| | - Miao Liu
- Department of Radiology, The 903rd Hospital of People's Liberation Army, Hangzhou, Zhejiang, China
| | - Ying Yuan
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, 79# Qingchun Road, Hangzhou, Zhejiang, 310003, China
| | - Michele C Battié
- Faculty of Health Sciences, School of Physical Therapy, Western University, London, ON, Canada
| | - Yue Wang
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, 79# Qingchun Road, Hangzhou, Zhejiang, 310003, China.
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Jarraya M, Guermazi A, Roemer FW. Osteoarthritis year in review 2023: Imaging. Osteoarthritis Cartilage 2024; 32:18-27. [PMID: 37879600 DOI: 10.1016/j.joca.2023.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 09/24/2023] [Accepted: 10/17/2023] [Indexed: 10/27/2023]
Abstract
PURPOSE This narrative review summarizes the original research in the field of in vivo osteoarthritis (OA) imaging between 1 January 2022 and 1 April 2023. METHODS A PubMed search was conducted using the following several terms pertaining to OA imaging, including but not limited to "Osteoarthritis / OA", "Magnetic resonance imaging / MRI", "X-ray" "Computed tomography / CT", "artificial intelligence /AI", "deep learning", "machine learning". This review is organized by topics including the anatomical structure of interest and modality, AI, challenges of OA imaging in the context of clinical trials, and imaging biomarkers in clinical trials and interventional studies. Ex vivo and animal studies were excluded from this review. RESULTS Two hundred and forty-nine publications were relevant to in vivo human OA imaging. Among the articles included, the knee joint (61%) and MRI (42%) were the predominant anatomical area and imaging modalities studied. Marked heterogeneity of structural tissue damage in OA knees was reported, a finding of potential relevance to clinical trial inclusion. The use of AI continues to rise rapidly to be applied in various aspect of OA imaging research but a lack of generalizability beyond highly standardized datasets limit interpretation and wide-spread application. No pharmacologic clinical trials using imaging data as outcome measures have been published in the period of interest. CONCLUSIONS Recent advances in OA imaging continue to heavily weigh on the use of AI. MRI remains the most important modality with a growing role in outcome prediction and classification.
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Affiliation(s)
- Mohamed Jarraya
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
| | - Ali Guermazi
- Department of Radiology, VA Boston Healthcare System, Boston University School of Medicine, Boston, MA, USA.
| | - Frank W Roemer
- Department of Radiology, VA Boston Healthcare System, Boston University School of Medicine, Boston, MA, USA; Department of Radiology, Universitätsklinikum Erlangen & Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.
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Ashida Y, Miki T, Kondo Y, Takebayashi T. Influence of radiological factors, psychosocial factors, and central sensitization-related symptoms on clinical symptoms in patients with lumbar spinal canal stenosis. J Back Musculoskelet Rehabil 2024; 37:369-377. [PMID: 37955077 DOI: 10.3233/bmr-230093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
BACKGROUND No study to date has concurrently evaluated the impact of radiological factors, psychosocial factors, and central sensitization (CS) related symptoms in a single lumbar spinal canal stenosis (LSS) patient cohort. OBJECTIVE To investigate the associations between these factors and clinical symptoms in LSS patients. METHODS We recruited 154 patients with LSS scheduled for surgery. Patient-reported outcome measures and imaging evaluation including clinical symptoms, psychosocial factors, CS-related symptoms, and radiological classifications. Spearman's rank correlation coefficient and multiple regression analyses were employed. RESULTS Spearman's correlation revealed CS-related symptoms positively correlated with low back pain (r= 0.25, p< 0.01), leg pain (r= 0.26, p< 0.01), and disability (r= 0.32, p< 0.01). Pain catastrophizing positively correlated with leg pain (r= 0.23, p< 0.01) and disability (r= 0.36, p< 0.01). Regression analysis showed that pain catastrophizing was associated with disability (β= 0.24, 95%CI = 0.03-0.18), and CS-related symptoms with low back pain (β= 0.28, 95%CI = 0.01-0.09). Radiological classifications were not associated with clinical symptoms. CONCLUSION Our findings suggest that psychosocial factors and CS-related symptoms, rather than radiological factors, seem to contribute to clinical symptoms in patients with LSS.
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Affiliation(s)
- Yuzo Ashida
- Department of Rehabilitation, Sapporo Maruyama Orthopedic Hospital, Sapporo, Japan
| | - Takahiro Miki
- PREVENT Inc., Nagoya, Japan
- Graduate School, Hokkaido University, Sapporo, Japan
| | - Yu Kondo
- Department of Rehabilitation, Sapporo Maruyama Orthopedic Hospital, Sapporo, Japan
| | - Tsuneo Takebayashi
- Department of Orthopedic, Sapporo Maruyama Orthopedic Hospital, Sapporo, Japan
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Jha R, Bernstock JD, Chalif JI, Hoffman SE, Gupta S, Guo H, Lu Y. Updates on Pathophysiology of Discogenic Back Pain. J Clin Med 2023; 12:6907. [PMID: 37959372 PMCID: PMC10647359 DOI: 10.3390/jcm12216907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/25/2023] [Accepted: 10/31/2023] [Indexed: 11/15/2023] Open
Abstract
Discogenic back pain, a subset of chronic back pain, is caused by intervertebral disc (IVD) degeneration, and imparts a notable socioeconomic health burden on the population. However, degeneration by itself does not necessarily imply discogenic pain. In this review, we highlight the existing literature on the pathophysiology of discogenic back pain, focusing on the biomechanical and biochemical steps that lead to pain in the setting of IVD degeneration. Though the pathophysiology is incompletely characterized, the current evidence favors a framework where degeneration leads to IVD inflammation, and subsequent immune milieu recruitment. Chronic inflammation serves as a basis of penetrating neovascularization and neoinnervation into the IVD. Hence, nociceptive sensitization emerges, which manifests as discogenic back pain. Recent studies also highlight the complimentary roles of low virulence infections and central nervous system (CNS) metabolic state alteration. Targeted therapies that seek to disrupt inflammation, angiogenesis, and neurogenic pathways are being investigated. Regenerative therapy in the form of gene therapy and cell-based therapy are also being explored.
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Affiliation(s)
- Rohan Jha
- Harvard Medical School, Boston, MA 02115, USA
- Department of Neurosurgery, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Joshua D. Bernstock
- Department of Neurosurgery, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Joshua I. Chalif
- Department of Neurosurgery, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Samantha E. Hoffman
- Harvard Medical School, Boston, MA 02115, USA
- Department of Neurosurgery, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Saksham Gupta
- Department of Neurosurgery, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Hong Guo
- Department of Neurosurgery, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Yi Lu
- Department of Neurosurgery, Brigham and Women’s Hospital, Boston, MA 02115, USA
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Minetama M, Kawakami M, Nakatani T, Teraguchi M, Nakagawa M, Yamamoto Y, Matsuo S, Sakon N, Nakagawa Y. Lumbar paraspinal muscle morphology is associated with spinal degeneration in patients with lumbar spinal stenosis. Spine J 2023; 23:1630-1640. [PMID: 37394143 DOI: 10.1016/j.spinee.2023.06.398] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 06/27/2023] [Indexed: 07/04/2023]
Abstract
BACKGROUND CONTEXT Lumbar spinal stenosis (LSS) has been reported to induce changes in paraspinal muscle morphology, but objective physical function and degenerative spine conditions are rarely assessed. PURPOSE To identify factors associated with paraspinal muscle morphology using objective physical and degenerative spine assessments in patients with LSS. STUDY DESIGN/SETTING Cross-sectional design. PATIENT SAMPLE Seventy patients with neurogenic claudication caused by LSS, receiving outpatient physical therapy. OUTCOME MEASURES Cross-sectional area (CSA) and functional CSA (FCSA) of the multifidus, erector spinae, and psoas muscles, the severity of stenosis, disc degeneration, and endplate abnormalities were evaluated by magnetic resonance imaging, as well as sagittal spinopelvic alignment by X-ray. Objective physical assessments included pedometry and claudication distance. Patient-reported outcomes included the numerical rating scale of low back pain, leg pain, and leg numbness, and the Zurich Claudication Questionnaire. METHODS To assess the impact of LSS on paraspinal muscles, FCSA and FCSA/CSA were compared between the dominant and nondominant sides based on the patients' neurogenic symptoms, and multivariable regression analyses adjusted for age, sex, height, and weight were performed; p<.05 was considered significant. RESULTS Seventy patients were analyzed. At one level below the maximum stenotic level, erector spinae FCSA on the dominant side was significantly lower than that on the nondominant side. In the multivariable regression analyses, at one level below the symptomatic level, disc degeneration, endplate abnormalities, and lumbar spinopelvic alignment, such as decreased lumbar lordosis and increased pelvic tilt, were negatively associated with multifidus FCSA and FCSA/CSA ratio. A significant association was observed between dural sac CSA and erector spinae FCSA. Throughout L1/2 to L5/S, disc degeneration, endplate abnormalities, and lumbar spinopelvic alignment were negatively associated with multifidus and erector spinae FCSA or FCSA/CSA. CONCLUSIONS Lumbar paraspinal muscle asymmetry caused by LSS was observed only in erector spinae. Disc degeneration, endplate abnormalities, and lumbar spinopelvic alignment, rather than spinal stenosis and LSS symptoms, were more associated with paraspinal muscle atrophy or fat infiltration.
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Affiliation(s)
- Masakazu Minetama
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan.
| | - Mamoru Kawakami
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan; Department of Orthopedic Surgery, Saiseikai Wakayama Hospital, 45 Jyunibancho, Wakayama city, Wakayama, 640-8158, Japan
| | - Tomohiro Nakatani
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan
| | - Masatoshi Teraguchi
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan
| | - Masafumi Nakagawa
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan
| | - Yoshio Yamamoto
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan
| | - Sachika Matsuo
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan
| | - Nana Sakon
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan
| | - Yukihiro Nakagawa
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan
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