Spondylolisthesis

Spondylolisthesis is the displacement of one spinal vertebra compared to another. While some medical dictionaries define spondylolisthesis specifically as the forward or anterior displacement of a vertebra over the vertebra inferior to it (or the sacrum),[1][2] it is often defined in medical textbooks as displacement in any direction.[3][4] Spondylolisthesis is graded based upon the degree of slippage of one vertebral body relative to the subsequent adjacent vertebral body.[5] Spondylolisthesis is classified as one of the six major etiologies: degenerative, traumatic, dysplastic, isthmic, pathologic, or post-surgical.[6] Spondylolisthesis most commonly occurs in the lumbar spine, primarily at the L5-S1 level with the L5 vertebral body anteriorly translating over the S1 vertebral body.[6]

Not to be confused with Spondylosis, Spondylitis, Spondylolysis, or Slipped disk.
Spondylolisthesis
Other namesOlisthesis
X-ray of the lateral lumbar spine with a grade III anterolisthesis at the L5-S1 level.
Pronunciation
  • /ˌspɒndɪloʊlɪsˈθiːsɪs/ SPON-dil-oh-lis-THEE-sis
SpecialtyOrthopedics

Types

Olisthesis (synonym olisthy) is a term that more explicitly denotes displacement in any direction.[7] Forward or anterior displacement can specifically be called anterolisthesis.[3][4] Anterolisthesis commonly involves the fifth lumbar vertebra.[8] Backward displacement is called retrolisthesis. Lateral displacement is called lateral listhesis[3] or laterolisthesis.[4]

A hangman's fracture is a specific type of spondylolisthesis where the second cervical vertebra (C2) is displaced anteriorly relative to the C3 vertebra due to fractures of the C2 vertebra's pedicles.

Anterolisthesis

Classification

Anterolisthesis can be categorized by cause, location and severity.

By causes
  • Degenerative anterolisthesis (a.k.a. type 3) is a disease of the older adult that develops as a result of facet arthritis and joint remodeling. Joint arthritis, and ligamentum flavum weakness, may result in slippage of a vertebra. Degenerative forms are more likely to occur in women, persons older than fifty, and African Americans.[9]
  • Traumatic anterolisthesis is rare and results from acute fractures in the neural arch, other than the pars.[10]
  • Dysplastic anterolisthesis (a.k.a. type 1) results from congenital abnormalities of the upper sacral facets or inferior facets of the fifth lumbar vertebra, and accounts for 14% to 21% of all anterolisthesis.[11]
  • Isthmic anterolisthesis (a.k.a. type 2) is caused by a defect in the pars interarticularis but it can also be seen with an elongated pars.
  • Pathologic anterolisthesis (a.k.a. type 5) is caused by either infection or a malignancy.
  • Post-surgical/iatrogenic anterolisthesis (a.k.a. type 6) is caused by complications after surgery.

By location

Anterolisthesis location includes which vertebrae are involved, and may also specify which parts of the vertebrae are affected.

Isthmic anterolisthesis is where there is a defect in the pars interarticularis.[12] It is the most common form of spondylolisthesis; also called spondylolytic spondylolisthesis, it occurs with a reported prevalence of 5–7 percent in the US population. A slip or fracture of the intravertebral joint is usually acquired between the ages of 6 and 16 years, but remains unnoticed until adulthood. Roughly 90 percent of these isthmic slips are low-grade (less than 50 percent slip) and 10 percent are high-grade (greater than 50 percent slip).[9] It is divided into three subtypes:[13]

    • A: pars fatigue fracture
    • B: pars elongation due to multiple healed stress effects
    • C: pars acute fracture

Severity

Classification by degree of the slippage, as measured as percentage of the width of the vertebral body:[14] Grade I spondylolisthesis accounts for approximately 75% of all cases.[6]

  • Grade I: 0–25%
  • Grade II: 25- 50%
  • Grade III: 50–75%
  • Grade IV: 75–100%
  • Grade V: greater than 100%
  • X-ray of measurement of spondylolisthesis at the lumbosacral joint, being 25% in this example.
  • X-ray picture of a grade 1 isthmic anterolisthesis at L4-5
  • MRI of L5-S1 anterolisthesis
  • X-ray of a grade 4 anterolisthesis at L5-S1 with spinal misalignment indicated
  • Anterolisthesis L5/S1
  • Anterolisthesis L5/S1
  • Anterolisthesis L5/S1. Blue arrow normal pars interarticularis. Red arrow is a break in pars interarticularis
  • Anterolisthesis L5/S1

Signs and symptoms

Symptoms of lumbar anterolisthesis include:

  • A general stiffening of the back and a tightening of the hamstrings, with a resulting change in both posture and gait.
  • A leaning-forward or semi-kyphotic posture may be seen, due to compensatory changes.
  • A "waddle" may be seen in more advanced causes, due to compensatory pelvic rotation due to decreased lumbar spine rotation.
  • A result of the change in gait is often a noticeable atrophy in the gluteal muscles due to lack of use.
  • Generalized lower-back pain may also be seen, with intermittent shooting pain from the buttocks to the posterior thigh, and/or lower leg via the sciatic nerve.

Other symptoms may include tingling and numbness. Coughing and sneezing can intensify the pain. An individual may also note a "slipping sensation" when moving into an upright position. Sitting and trying to stand up may be painful and difficult.[15][16]

Physical Exam

The major components of the physical exam for spondylolisthesis consists of observation, palpation, and maneuvers. The most common finding is pain with lumbar extension.[17] The following physical involves specific assessment for spondylolisthesis. However, a general examination, most importantly neurological examination, must be done to rule out alternative causes for signs and symptoms. Neurological examination is often normal in patients with spondylolisthesis, but lumbosacral radiculopathy is commonly seen in patients with degenerate spondylolisthesis.[18]

Observation

The patient should be observed walking and standing. Most patients present with a normal gait. An abnormal gait is often the sign of a high grade case.[19] A patient with high grade spondylolisthesis may present with a posterior pelvic tilt causing a loss in the normal contour of the buttocks.[19] An antalgic gait, rounded back and decreased hip extension, can result from severe pain.[20] While standing, the patient should be observed from the front, back, and signs. Increased and decreased lumbar lordosis, inward curvature of the lower spine, has been seen.[17][21]

Palpation

Detection of spondylolisthesis by palpation is most often done by palpating for the spinous process.[22] Each level of the lumbar spine should be palpated. Spinous process palpation by itself is not a definitive method for the detection of spondylolisthesis.[22]

Maneuvers
  • Spinal range of motion testing – Range of motion limitations may be seen.
  • Lumbar hyperextension – Extension often elicits pain. This can be assessed by having the patient hyperextend the lumbar spine, provide resistance against back extensions, or undergo repeated lumbar extensions.
  • Sport-specific motion – Patient can be asked to repeat aggravating movements that they experience during their activity. During the movement, ask patient to point to any places with focal pain.
  • Straight leg raise – Maneuver used to assess for hamstring tightness. The straight leg raise has been found to be positive in only 10% of patients with spondylolisthesis.[21]
  • Muscle strength exercises – Lower abdominal, gluteal, and lumbar extensors should be assessed for weakness. Weakness in these muscles can increase lordosis and contribute to sacroiliac instability.[23] Abdominal flexor strength can be assessed with the abdominal flexor endurance test. The test involves the patient lying supine while holding a 45 degree flexed trunk and 90 degree flexed knees for 30 seconds. Gluteal strength can be assessed with a single leg squat. Lastly, lumbar extension can be assessed with a single leg bridge.

Diagnostic Imaging

In adults with non-specific low back pain, strong evidence suggests medical imaging should not be done within the first six weeks.[24] It is also suggested to avoid advanced imaging, such as CT or MRI, for adults without neurological symptoms or "red flags" in the patient's history.[25][26] General recommendations for initial low back pain treatment is remaining active, avoiding twisting and bending, avoiding activities that worsen pain, avoiding bed rest, and possibly initiating a trial of non-steroidal anti-inflammatory drugs after consulting a physician.[27] Children and adolescents with persistent low back pain may require earlier imaging and should be seen by physician. Once imaging is deemed necessary, a combination of plain radiography, computed tomography, and magnetic resonance imaging may be used. Images are most often taken of the lumbar spine due to spondylolisthesis most commonly involving the lumbar region.[6] Images of the thoracic spine can be taken if a patient's history and physical suggest thoracic involvement.

Plain Radiography (X-Ray)

Plain radiography is often the first step in medical imaging.[17] Anteroposterior (front-back) and lateral (side) images are used to allow the physician to view the spine at multiple angles.[17] Oblique view are no longer recommended.[28][29] In evaluating for spondylolithesis, plain radiographs provide information on the positioning and structural integrity of the spine. Therefore, if further detail is needed a physician may request advanced imaging.

Magnetic Resonance Imaging (MRI)

Magnetic resonance imaging is the preferred advanced imaging technique for evaluation of spondylolisthesis.[30] Preference is due to effectiveness, lack of radiation exposure, and ability to evaluate for soft tissue abnormalities and spinal canal involvement.[30][31] MRI is limited in its ability to evaluate fractures in great detail, compared to other advanced imaging modalities.[32]

Computed Tomography (CT)

Computed tomography can be helpful in evaluating bony vertebral abnormalities, such as fractures.[33] This can be helpful in determining if the fracture is a new, old, and/or progressing fracture.[33] CT use in spondylolisthesis evaluation is controversial due to high radiation exposure.[34]

Treatment

Spondylolisthesis patients without symptoms do not need to be treated.[35]

Conservative

Non-operative management, also referred to as conservative treatment, is the recommended treatment for spondylolisthesis in most cases with or without neurological symptoms.[36] Most patients with spondylolisthesis respond to conservative treatment.[35] Conservative treatment consists primarily of physical therapy, intermittent bracing, aerobic exercise, pharmacological intervention, and epidural steroid injections. The majority of patients with degenerative spondylolisthesis do not require surgical intervention.[37]

  • Physical therapy can evaluate and address postural and compensatory movement abnormalities.[38] Physical therapy primarily includes spinal flexion and extension exercises with a focus on core stabilization and muscle strengthening. In particular, lumbar spondylolisthesis may benefit from core stabilization exercises focusing on lower abdominal, lumbar muscles, hamstrings, and hip flexors, which may temporarily or permanently improve symptoms and improve general function.[39]
  • Some patients may benefit from bracing in combination with physical therapy. Additionally, bracing was found to be beneficial when performed immediately following the onset of symptoms, in particular patients with lumbar pars interarticular defects.[39]
  • Exercises such as cycling, elliptical training, swimming, and walking are considered low-impact aerobic exercises and are recommended for pain relief.[40]
  • Anti-inflammatory medications (NSAIDS) in combination with paracetamol (Tylenol) can be tried initially. If a severe radicular component is present, a short course of oral steroids such as prednisone or methylprednisolone can be considered.[40] Epidural steroid injections, either interlaminal or transforaminal, performed under fluoroscopic guidance can help with severe radicular (leg) pain, but lacks conclusive benefit in relieving back pain in lumbar spondylolisthesis.[41]

Surgical

There are no clear radiological or medical guidelines or indications for surgical interventions in degenerative spondylolisthesis.[42] A minimum of three months of conservative management should be completed prior to considering surgical intervention.[42] Three indications for potential surgical treatment are as follows: persistent or recurrent back pain or neurologic pain with a persistent reduction of quality of life despite a reasonable trial of conservative (non-operative) management, new or worsening bladder or bowel symptoms, or a new or worsening neurological deficit.[43]

Degenerative spondylolisthesis at L5 - S1.
(A) CT sagittal view of a low grade slip.
(B) Lateral radiograph pre-operative intervention.
(C) Surgically treated with L5 – S1 decompression, instrumented fusion and placement of an interbody graft between L5 and S1.

Both minimally invasive and open surgical techniques are used to treat anterolisthesis.[44]

Retrolisthesis
Grade 1 retrolistheses of C3 on C4 and C4 on C5
Main article: Retrolisthesis

A retrolisthesis is a posterior displacement of one vertebral body with respect to the subjacent vertebra to a degree less than a luxation (dislocation). Retrolistheses are most easily diagnosed on lateral x-ray views of the spine. Views, where care has been taken to expose for a true lateral view without any rotation, offer the best diagnostic quality.

Retrolistheses are found most prominently in the cervical spine and lumbar region but can also be seen in the thoracic area.

History

Spondylolisthesis was first described in 1782 by Belgian obstetrician Herbinaux.[45] He reported a bony prominence anterior to the sacrum that obstructed the vagina of a small number of patients.[46] The term “spondylolisthesis” was coined in 1854 from the Greek σπονδυλος, "spondylos" = "vertebra" and ὀλισθός "olisthos" = "slipperiness," "a slip."[47]

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gollark: Yes, event winners are automatically trustworthy.
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See also

References
  1. "spondylolisthesis". Merriam-Webster medical dictionary. Retrieved 2017-09-07.
  2. "spondylolisthesis". Farlex medical dictionary. Retrieved 2017-09-07., in turn citing:
    • Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. Copyright date 2003
    • Dorland's Medical Dictionary for Health Consumers. Copyright date 2007
    • The American Heritage Medical Dictionary. Copyright date 2007
    • Mosby's Medical Dictionary, 9th edition
    • McGraw-Hill Concise Dictionary of Modern Medicine. Copyright date 2002
    • Collins Dictionary of Medicine. Copyright date 2005
  3. Introduction to chapter 17 in: Thomas J. Errico, Baron S. Lonner, Andrew W. Moulton (2009). Surgical Management of Spinal Deformities. Elsevier Health Sciences. ISBN 9781416033721.CS1 maint: multiple names: authors list (link)
  4. Page 250 in: Walter R. Frontera, Julie K. Silver, Thomas D. Rizzo (2014). Essentials of Physical Medicine and Rehabilitation (3 ed.). Elsevier Health Sciences. ISBN 9780323222723.CS1 maint: multiple names: authors list (link)
  5. Shamrock, Alan G.; Donnally III, Chester J.; Varacallo, Matthew (2019), "Lumbar Spondylolysis And Spondylolisthesis", StatPearls, StatPearls Publishing, PMID 28846329, retrieved 2019-10-28
  6. Tenny, Steven; Gillis, Christopher C. (2019), "Spondylolisthesis", StatPearls, StatPearls Publishing, PMID 28613518, retrieved 2019-10-28
  7. Frank Gaillard. "Olisthesis". Radiopaedia. Retrieved 2018-02-21.
  8. Foreman P, Griessenauer CJ, Watanabe K, Conklin M, Shoja MM, Rozzelle CJ, Loukas M, Tubbs RS (2013). "L5 spondylolysis/spondylolisthesis: a comprehensive review with an anatomic focus". Child's Nervous System. 29 (2): 209–16. doi:10.1007/s00381-012-1942-2. PMID 23089935.
  9. "Adult Spondylolisthesis in the Low Back". American Academy of Orthopaedic Surgeons. Retrieved 9 June 2013.
  10. Syrmou E, Tsitsopoulos PP, Marinopoulos D, Tsonidis C, Anagnostopoulos I, Tsitsopoulos PD (2010). "Spondylolysis: a review and reappraisal". Hippokratia. 14 (1): 17–21. PMC 2843565. PMID 20411054.
  11. Leone LD, Lamont DW (1999). "Diagnosis and treatment of severe dysplastic spondylolisthesis". The Journal of the American Osteopathic Association. 99 (6): 326–8. doi:10.7556/jaoa.1999.99.6.326. PMID 10405520.
  12. Aruna Ganju (2002). "Isthmic Spondylolisthesis". Neurosurg Focus. 13 (1).
  13. "Adult Isthmic Spondylolisthesis – Spine – Orthobullets".
  14. "Spondylolysis and Spondylolisthesis of the Lumbar Spine". Massachusetts General Hospital. Retrieved 2016-12-14.
  15. "Adult Spondylolisthesis in the Low Back – OrthoInfo – AAOS".
  16. "Pain Management: Spondylolisthesis".
  17. Tofte, Josef N.; CarlLee, Tyler L.; Holte, Andrew J.; Sitton, Sean E.; Weinstein, Stuart L. (2017-05-15). "Imaging Pediatric Spondylolysis: A Systematic Review". Spine. 42 (10): 777–782. doi:10.1097/BRS.0000000000001912. ISSN 1528-1159. PMID 27669047.
  18. Bolesta, M. J.; Bohlman, H. H. (1989). "Degenerative spondylolisthesis". Instructional Course Lectures. 38: 157–165. ISSN 0065-6895. PMID 2649568.
  19. Meyers, Laura L.; Dobson, Scott R.; Wiegand, Dave; Webb, Julie D.; Mencio, Gregory A. (September 1999). "Mechanical Instability as a Cause of Gait Disturbance in High-Grade Spondylolisthesis: A Pre-and Postoperative Three-Dimensional Gait Analysis". Journal of Pediatric Orthopaedics. 19 (5): 672. doi:10.1097/01241398-199909000-00024. ISSN 0271-6798.
  20. Al-Obaidi, Saud M.; Al-Zoabi, Baker; Al-Shuwaie, Nadia; Al-Zaabie, Najeeba; Nelson, Roger M. (June 2003). "The influence of pain and pain-related fear and disability beliefs on walking velocity in chronic low back pain". International Journal of Rehabilitation Research. 26 (2): 101. doi:10.1097/00004356-200306000-00004. ISSN 0342-5282.
  21. Kalpakcioglu, Banu; Altınbilek, Turgay; Senel, Kazım (2009-03-27). "Determination of spondylolisthesis in low back pain by clinical evaluation". Journal of Back and Musculoskeletal Rehabilitation. 22 (1): 27–32. doi:10.3233/BMR-2009-0212. PMID 20023361.
  22. Collaer, Jeff W.; McKeough, D. Michael; Boissonnault, William G. (2006-01-01). "Lumbar Isthmic Spondylolisthesis Detection with Palpation: Interrater Reliability and Concurrent Criterion-Related Validity". Journal of Manual & Manipulative Therapy. 14 (1): 22–29. doi:10.1179/106698106790820917. ISSN 1066-9817.
  23. Petty, Nicola J.; Moore, Ann P. (2011). Neuromusculoskeletal Examination and Assessment,A Handbook for Therapists with PAGEBURST Access,4: Neuromusculoskeletal Examination and Assessment. Elsevier Health Sciences. ISBN 9780702029905.
  24. "Imaging for Low Back Pain". www.aafp.org. Retrieved 2019-11-07.
  25. Chou, Roger; Qaseem, Amir; Owens, Douglas K.; Shekelle, Paul; Clinical Guidelines Committee of the American College of Physicians (2011-02-01). "Diagnostic imaging for low back pain: advice for high-value health care from the American College of Physicians". Annals of Internal Medicine. 154 (3): 181–189. doi:10.7326/0003-4819-154-3-201102010-00008. ISSN 1539-3704. PMID 21282698.
  26. Chou, Roger; Fu, Rongwei; Carrino, John A.; Deyo, Richard A. (2009-02-07). "Imaging strategies for low-back pain: systematic review and meta-analysis". Lancet. 373 (9662): 463–472. doi:10.1016/S0140-6736(09)60172-0. ISSN 1474-547X. PMID 19200918.
  27. Casazza, Brian A. (2012-02-15). "Diagnosis and Treatment of Acute Low Back Pain". American Family Physician. 85 (4): 343–350. ISSN 0002-838X.
  28. Libson, E.; Bloom, R. A.; Dinari, G. (1982). "Symptomatic and asymptomatic spondylolysis and spondylolisthesis in young adults". International Orthopaedics. 6 (4): 259–261. doi:10.1007/bf00267148. ISSN 0341-2695. PMID 6222997.
  29. Saifuddin, A.; White, J.; Tucker, S.; Taylor, B. A. (March 1998). "Orientation of lumbar pars defects: implications for radiological detection and surgical management". The Journal of Bone and Joint Surgery. British Volume. 80 (2): 208–211. doi:10.1302/0301-620x.80b2.8219. ISSN 0301-620X. PMID 9546445.
  30. Thornhill, Beverly A.; Green, Debra J.; Schoenfeld, Alan H. (2015), Wollowick, Adam L.; Sarwahi, Vishal (eds.), "Imaging Techniques for the Diagnosis of Spondylolisthesis", Spondylolisthesis: Diagnosis, Non-Surgical Management, and Surgical Techniques, Springer US, pp. 59–94, doi:10.1007/978-1-4899-7575-1_6, ISBN 9781489975751
  31. Kobayashi, Atsushi; Kobayashi, Tsutomu; Kato, Kazuo; Higuchi, Hiroshi; Takagishi, Kenji (January 2013). "Diagnosis of radiographically occult lumbar spondylolysis in young athletes by magnetic resonance imaging". The American Journal of Sports Medicine. 41 (1): 169–176. doi:10.1177/0363546512464946. ISSN 1552-3365. PMID 23136176.
  32. Maurer, Marvin; Soder, Ricardo Bernardi; Baldisserotto, Matteo (February 2011). "Spine abnormalities depicted by magnetic resonance imaging in adolescent rowers". The American Journal of Sports Medicine. 39 (2): 392–397. doi:10.1177/0363546510381365. ISSN 1552-3365. PMID 20889986.
  33. Morita, T.; Ikata, T.; Katoh, S.; Miyake, R. (July 1995). "Lumbar spondylolysis in children and adolescents". The Journal of Bone and Joint Surgery. British Volume. 77 (4): 620–625. ISSN 0301-620X. PMID 7615609.
  34. Leone, Antonio; Cianfoni, Alessandro; Cerase, Alfonso; Magarelli, Nicola; Bonomo, Lorenzo (2011-06-01). "Lumbar spondylolysis: a review". Skeletal Radiology. 40 (6): 683–700. doi:10.1007/s00256-010-0942-0. ISSN 1432-2161. PMID 20440613.
  35. Haun, Daniel W.; Kettner, Norman W. (2005). "Spondylolysis and spondylolisthesis: a narrative review of etiology, diagnosis, and conservative management". Journal of Chiropractic Medicine. 4 (4): 206–217. doi:10.1016/S0899-3467(07)60153-0. ISSN 1556-3707. PMC 2647050. PMID 19674664.
  36. Vibert, Brady T.; Sliva, Christopher D.; Herkowitz, Harry N. (February 2006). "Treatment of instability and spondylolisthesis: surgical versus nonsurgical treatment". Clinical Orthopaedics and Related Research. 443: 222–227. doi:10.1097/01.blo.0000200233.99436.ea. ISSN 0009-921X. PMID 16462445.
  37. Evans, Nick; McCarthy, Michael (2018-12-19). "Management of symptomatic degenerative low-grade lumbar spondylolisthesis". EFORT Open Reviews. 3 (12): 620–631. doi:10.1302/2058-5241.3.180020. ISSN 2058-5241. PMC 6335606. PMID 30697442.
  38. Treatment Options for Spondylolisthesis; OrthoConsult
  39. Garet, Matthew; Reiman, Michael P.; Mathers, Jessie; Sylvain, Jonathan (May 2013). "Nonoperative treatment in lumbar spondylolysis and spondylolisthesis: a systematic review". Sports Health. 5 (3): 225–232. doi:10.1177/1941738113480936. ISSN 1941-7381. PMC 3658408. PMID 24427393.
  40. Kalichman, Leonid; Hunter, David J. (March 2008). "Diagnosis and conservative management of degenerative lumbar spondylolisthesis". European Spine Journal. 17 (3): 327–335. doi:10.1007/s00586-007-0543-3. ISSN 0940-6719. PMC 2270383. PMID 18026865.
  41. Metzger, Robert; Chaney, Susan (2014). "Spondylolysis and spondylolisthesis: What the primary care provider should know". Journal of the American Association of Nurse Practitioners. 26 (1): 5–12. doi:10.1002/2327-6924.12083. ISSN 2327-6924. PMID 24170707.
  42. Steiger, F.; Becker, H.-J.; Standaert, C. J.; Balague, F.; Vader, J.-P.; Porchet, F.; Mannion, A. F. (May 2014). "Surgery in lumbar degenerative spondylolisthesis: indications, outcomes and complications. A systematic review". European Spine Journal. 23 (5): 945–973. doi:10.1007/s00586-013-3144-3. ISSN 1432-0932. PMID 24402446.
  43. Sengupta, Dilip K.; Herkowitz, Harry N. (2005-03-15). "Degenerative spondylolisthesis: review of current trends and controversies". Spine. 30 (6 Suppl): S71–81. doi:10.1097/01.brs.0000155579.88537.8e. ISSN 1528-1159. PMID 15767890.
  44. Lu VM, Kerezoudis P, Gilder HE, McCutcheon BA, Phan K, Bydon M (2017). "Minimally Invasive Surgery Versus Open Surgery Spinal Fusion for Spondylolisthesis: A Systematic Review and Meta-analysis". Spine. 42 (3): E177–E185. doi:10.1097/BRS.0000000000001731. PMID 27285899.
  45. Newman PH (1955). "Spondylolisthesis, its cause and effect". Annals of the Royal College of Surgeons of England. 16 (5): 305–23. PMC 2377893. PMID 14377314.
  46. Garrigues, Henry Jacques (1902). "Spondylolisthesic pelvis". A textbook of the science and art of obstetrics. pp. 490–93. OCLC 654149619.
  47. "Isthmic Spondylolisthesis and Spondylolysis".
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