Evaluation of the Relationship Between L5-S1 Spondylolysis and Isthmic Spondylolisthesis and Lumbosacral-Pelvic Morphology by Imaging via 2- and 3-Dimensional Reformatted Computed Tomography

Ergün, Tarkan; Şahin, Mehmet Şükrü; Lakadamyalı, Hatıce

doi:10.1097/rct.0b013e3181f08947

Cited by 11 publications

(5 citation statements)

References 15 publications

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“…Masharawi [12], in a skeletal study of 115 spondylolytic specimens, concluded that the L5 is manifested with a longer Another study [4], in which CT images of 30 patients with L5-S1 level spondylolysis were analyzed retrospectively, concluded multiple factors including L5 pedicle width, height of the iliac crest, and L5 vertebra sagittal index in lumbosacropelvic morphology affect the defect development in pars interarticularis. Belfi et al [2] reported that as many as 67% of patients with unilateral spondylolysis have sclerosis of the contralateral pedicle.…”

Section: Discussionmentioning

confidence: 99%

L5 Pedicle Length Is Increased in Subjects With Spondylolysis: An Anatomic Study of 1072 Cadavers

Bajwa

Toy

Ahn

2012

Clinical Orthopaedics &Amp; Related Research

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Background In spondylolisthesis, it is believed that as L5 slips on S1, the pedicle may become elongated in response to the instability in an attempt to bridge the defect. Whether patients with spondylolysis, which is largely developmental, also develop elongation of the pedicles is unknown. Questions/purposes The purpose of this study is to evaluate and quantify the increase in L5 pedicle length in subjects with spondylolysis as compared with normal healthy subjects. Methods Nine hundred fifty-two human cadaveric specimens without spondylolysis and 120 specimens with spondylolysis from the Hamann-Todd Osteological Collection were examined by a single examiner. Baseline data, including age, sex, and race of specimens, were collected. Digital calipers were used to measure the pedicle lengths at the L5 level. Linear regression analysis was performed to compare the L5 pedicle lengths in healthy patients and patients with spondylolysis. Results Linear regression showed a significant association of increased L5 pedicle length in subjects with spondylolysis. The average L5 pedicle length in subjects with spondylolysis was greater compared with subjects without spondylolysis. In spondylolytic specimens, pedicles start to elongate after the age of 40 years. The pedicle lengths increase progressively from 5.6 mm at 40 years to 6.7 mm at 80 years with a 1% to 3% increment every decade. The pedicle lengths showed little variation in specimens from healthy subjects. Conclusions In spondylolytic specimens, there is progressive elongation of L5 pedicle length after the third decade. An increase in L5 pedicle length in all age groups compared with the specimens from healthy subjects suggests that pathologic changes occur in bony anatomy of L5 vertebrae as early as adolescence when the condition develops.

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Section: Discussionmentioning

confidence: 99%

L5 Pedicle Length Is Increased in Subjects With Spondylolysis: An Anatomic Study of 1072 Cadavers

Bajwa

Toy

Ahn

2012

Clinical Orthopaedics &Amp; Related Research

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“…Kalpakcioglu et al [24] found patients with LDS had a significantly higher occurrence of paraspinal muscle hypertrophy in physical examination compared to control. Ergun et al [25] on analysis of CT scans of isthmic spondylolisthesis found that the area of paraspinal muscles was significantly increased in comparison to the controls. In recent study, by measuring 26 LDS patients, Nava-Bringas et al [26] found that multifidus muscle crosssectional area on MR were not influenced by degree of spondylolisthesis, or disc degeneration.…”

Section: G Wang Et Al / Quantitative Mri and X-ray Analysis Of Discmentioning

confidence: 99%

Quantitative MRI and X-ray analysis of disc degeneration and paraspinal muscle changes in degenerative spondylolisthesis

Wang

Karki

et al. 2015

BMR

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“…Given that the radiological findings of low-grade lytic spondylolisthesis were similar to those of dysplastic spondylolisthesis, careful attention would be required during preoperative planning. Posterior decompression and reduction using pedicle screw fixation is commonly used for spondylolisthesis, but in cases of lytic spondylolisthesis, the method of pedicle screw insertion would require modifications due to the different anatomical characteristics of the L5 vertebra [20][21][22]. Since the angle of the pedicle is wide in patients with L5/S1 lytic spondylolisthesis, Choi et al [12] have recommended that the L5 pedicle screw should be inserted more medially in such cases.…”

Section: Discussionmentioning

confidence: 99%

Radiological Characteristics of Low-Grade Lytic Spondylolisthesis: Similarity to Dysplastic Spondylolisthesis

Cho

Kim

2023

Asian Spine J

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This study aimed to analyze the etiology of low-grade lytic spondylolisthesis based on the radiologic features of the vertebra. Overview of Literature: According to the Marchetti-Bartolozzi classification scheme, high-grade lytic spondylolisthesis (Meyerding grade 3-5) is classified as dysplastic. However, determination of the etiology for low-grade lytic spondylolisthesis as developmental or traumatic remains controversial. Methods: Patients admitted and treated for one-level (L4/5 or L5/S1) low-grade spondylolisthesis were included in the study. A total of 135 patients were divided into the degenerative or lytic spondylolisthesis groups according to their condition (81 patients [degenerative group] vs. 54 patients [lytic group]). To assess the level of similarity in the radiological findings between low-grade lytic spondylolisthesis and dysplastic spondylolisthesis, the pedicle diameters and vertebral heights of the L4 and L5 vertebrae were measured on computed tomography images. Measurements were then converted to each vertebra's ratio to reduce confounding factors among individuals. Results:The affected vertebra had a smaller sagittal pedicle diameter/transverse pedicle diameter ratio in the low-grade lytic spondylolisthesis group compared to the degenerative group, and the posterior vertebral height/anterior vertebral height ratio of L5 was smaller in the L5/S1 lytic spondylolisthesis group compared to the degenerative spondylolisthesis group. Conclusions: Low-grade lytic spondylolisthesis and dysplastic spondylolisthesis demonstrated similar radiological findings. Hence, surgeons should be attentive to the morphology of the vertebral body and posterior column during preoperative planning for the treatment of low-grade lytic spondylolisthesis.

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Evaluation of the Relationship Between L5-S1 Spondylolysis and Isthmic Spondylolisthesis and Lumbosacral-Pelvic Morphology by Imaging via 2- and 3-Dimensional Reformatted Computed Tomography

Cited by 11 publications

References 15 publications

L5 Pedicle Length Is Increased in Subjects With Spondylolysis: An Anatomic Study of 1072 Cadavers

L5 Pedicle Length Is Increased in Subjects With Spondylolysis: An Anatomic Study of 1072 Cadavers

Quantitative MRI and X-ray analysis of disc degeneration and paraspinal muscle changes in degenerative spondylolisthesis

Radiological Characteristics of Low-Grade Lytic Spondylolisthesis: Similarity to Dysplastic Spondylolisthesis

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