====== Lumbosacral Spondyloptosis ======
Lumbosacral [[spondyloptosis]], by definition, is more than 100% anterior displacement of the [[L5]] [[vertebra]] with regard to the [[sacrum]]. It is also known as grade 5 [[spondylolisthesis]]
((Boos N, Marchesi D, Zuber K, Aebi M. Treatment of severe spondylolisthesis by reduction and pedicular fixation. A 4-6-year follow-up study. Spine. 1993;18(12):1655–1661.))
((Jo D J, Seo E M, Kim K T, Kim S M, Lee S H. Lumbosacral spondyloptosis treated using partial reduction and pedicular transvertebral screw fixation in an osteoporotic elderly patient. J Neurosurg Spine. 2012;16(2):206–209.))
((Chandrashekhara S H, Kumar A, Gamanagatti S. et al. Unusual traumatic spondyloptosis causing complete transaction of spinal cord. Int Orthop. 2011;35(11):1671–1675)).

===== Case reports =====

A 4-year-old girl was admitted to the emergency department after having been buried beneath a wall. A [[computed tomography]] scan revealed anterior grade V L5-S1 [[spondylolisthesis]], and [[magnetic resonance imaging]] showed a traumatic rupture of the fibrous [[annulus]] of the L5-S1 [[intervertebral disc]] and lesion of the anterior longitudinal and [[yellow ligament]]s. The patient underwent anterior and posterior [[fixation]]. Four months later she was able to walk independently, despite a persistent left [[foot drop]]. Additionally, Yamaki et al., from the University of [[Sao Paulo]], [[Brazil]]. conducted a [[literature review]] on lumbosacral spondyloptosis in the pediatric population published between 1990 and 2017. They found 16 cases, 86.6% of which were male, with a mean patient age of 16 ± 5.05 years. Most patients underwent spine [[instrumentation]]. Based on the data reviewed, the neurological status at admission might be a valid predictor of outcome. [[Pedicle screw]]s are a safe and reliable procedure for stable fixation of the spine in these cases. The removal of [[screw]]s is discouraged
((Yamaki VN, Morais BA, Brock RS, Paiva WS, de Andrade AF, Teixeira MJ.
Traumatic Lumbosacral Spondyloptosis in a Pediatric Patient: Case Report and
Literature Review. Pediatr Neurosurg. 2018 May 30:1-7. doi: 10.1159/000488766.
[Epub ahead of print] PubMed PMID: 29847821.
)).
----
A 28-year-old man presented with severe [[low back pain]], [[numbness]] at the soles of feet, and [[bowel]] and [[bladder dysfunction]]. Two days before admission, a tree trunk fell on his back while he was seated. A two-stage posterior-anterior procedure was performed. At the first stage, posterior [[decompression]], [[reduction]], and [[fusion]] with [[instrumentation]] were performed. At the second stage, which was performed 6 days after the first stage, the patient underwent [[anterior lumbar interbody fusion]]. The patient received physical therapy 1 week after the second stage. Results The patient's numbness improved immediately after the first posterior surgery. His fecal and [[urinary incontinence]] improved 6 months after discharge. He has been pain-free for a year and has returned to work. 

A [[PubMed]] search was performed using the following keywords: lumbosacral spondyloptosis, lumbosacral dislocation, and L5-S1 traumatic dislocation. The search returned only nine reported cases of traumatic [[spondyloptosis]]. [[Traumatic spondyloptosis]] at the lumbosacral junction is a rare ailment that should be suspected in cases of high, direct, and posterior impact on the low lumbar area, and surgical treatment should be the standard choice of care
((Akesen B, Mutlu M, Kara K, Aydınlı U. Traumatic lumbosacral spondyloptosis: a 
case report and review of the literature. Global Spine J. 2014 Feb;4(1):59-62.
doi: 10.1055/s-0033-1357082. Epub 2013 Oct 16. PubMed PMID: 24494183; PubMed
Central PMCID: PMC3908975.
)).