Is the atlas size associated with the pathophysiology of symptomatic spinal canal stenosis at the C1 level?

Yamahata, Hitoshi; Niiro, Tadaaki; Mori, Masanao; Yamaguchi, Satoshi; Yonenaga, Masanori; Sugata, Jun; Hiwatari, Takaaki; Okada, Tomohisa; Atsuchi, Masamichi; Arita, Kazunori; Yoshimoto, Koji

doi:10.1016/j.jocn.2018.08.036

Cited by 14 publications

(18 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present study is not without limitations. Although bone measurements could be associated with height and weight [34], such correlations were not analyzed in this study because height and weight of the donors were unknown.…”

Section: Discussionmentioning

confidence: 99%

Classification and Morphometric Features of Pterion in Thai Population with Potential Sex Prediction

et al. 2021

View full text Add to dashboard Cite

Background and Objectives: The landmark for neurosurgical approaches to access brain lesion is the pterion. The aim of the present study is to classify and examine the prevalence of all types of pterion variations and perform morphometric measurements from previously defined anthropological landmarks. Materials and methods: One-hundred and twenty-four Thai dried skulls were investigated. Classification and morphometric measurement of the pterion was performed. Machine learning models were also used to interpret the morphometric findings with respect to sex and age estimation. Results: Spheno-parietal type was the most common type (62.1%), followed by epipteric (11.7%), fronto-temporal (5.2%) and stellate (1.2%). Complete synostosis of the pterion suture was present in 18.5% and was only present in males. While most morphometric measurements were similar between males and females, the distances from the pterion center to the mastoid process and to the external occipital protuberance were longer in males. Random forest algorithm could predict sex with 80.7% accuracy (root mean square error = 0.38) when the pterion morphometric data were provided. Correlational analysis indicated that the distances from the pterion center to the anterior aspect of the frontozygomatic suture and to the zygomatic angle were positively correlated with age, which may serve as basis for age estimation in the future. Conclusions: Further studies are needed to explore the use of machine learning in anatomical studies and morphometry-based sex and age estimation. Thorough understanding of the anatomy of the pterion is clinically useful when planning pterional craniotomy, particularly when the position of the pterion may change with age.

show abstract

Section: Discussionmentioning

confidence: 99%

Classification and Morphometric Features of Pterion in Thai Population with Potential Sex Prediction

et al. 2021

View full text Add to dashboard Cite

show abstract

“…10 Diagnosis of DSSA is mainly based on cervical CT and MRI results, and clinical symptoms. 8,9,11,12 It was reported that the normal diameter of the midsagittal canal at C1 level ranged from 16 to 25 mm. 8 A diameter of less than 14 mm indicated significant compression of the cervical spinal cord, and a diameter of less than 10 mm would induce myelopathic signs and symptoms.…”

Section: Discussionmentioning

confidence: 99%

“…8 A diameter of less than 14 mm indicated significant compression of the cervical spinal cord, and a diameter of less than 10 mm would induce myelopathic signs and symptoms. 11 Patients whose cervical MR images reveal compression of the spinal cord at C1 level and upper cervical spinal medulla compression are diagnosed with DSSA and the stenosis is so severe that even a trivial trauma can predispose them to a progressive myelopathy as well as a high risk of severe spinal cord injury. Kunakornsawat et al 13 proposed a simple way of diagnosing DSSA using the C1 spinolaminar line.…”

Section: Discussionmentioning

confidence: 99%

Classification and Surgical Treatment of Developmental Spinal Canal Stenosis at Atlas Level

Wang

Zhu

Hong-ji

et al. 2020

Spine

View full text Add to dashboard Cite

Study Design. A retrospective study. Objective. Investigate the diagnosis and surgery strategy for treatment of development spinal canal stenosis (DSSA) at atlas plane based on computerized tography (CT) image characters. Summary of Background Data. The occurrence of spinal canal stenosis in the atlas plane is relatively rare compared with lower cervical. Methods. Fifteen patients diagnosed with DSSA were included from 2014 to 2018. They are divided into four subgroups based on the character of CT images: group I (small size atlas), group II (hypertrophy of posterior arch of the atlas [PAA]), group III (incurved of PAA), and group IV (hypertrophy odontoid).Results. There are type I 7, type II 3, type III 2, and group IV 3 in the 15 cases. All the patients received different surgery procedures respectively: (1) posterior arch osteotomy were performed for group I/III//IV without atlantoaxial dislocation, (2) posterior arch resect and replantation were performed for group II, (3) occipital cervical fixation and fusion were added to the patients with associated atlantoaxial dislocation (AAD), ( 4) a new method of odontoid reduce and atlantoaxial fixation by transoral approach were performed for group IV with associated AAD. All cases underwent surgery successfully which included posterior occipitocervical fixation (OCF) þ posterior arch resection (PAR) eight cases, PAR four cases, posterior arch remodeling and re-implantation (PARR) two cases, and Dens remodeling þ trans-oral anterior reduction and plate fixation (DRþTARP) one case without severe complications. All patients show different improvement in the symptoms. Japanese orthopaedic association score improved from 9.2 to 14.7 in 1 year follow-up. Conclusion. DSSA could be easily diagnosed and divided into four subgroups according to the character of CT image, corresponding surgery strategy could receive a fine clinical result.

show abstract

“…Almost all previous patients developed symptoms as adults, indicating that clinical changes occur in adulthood in addition to the congenital canal stenosis at the level of the atlas. Yamahata et al 12) proposed a "two-hit pathophysiology," stating that several pathologies such as ossification of the ligament, retro-odontoid pseudotumor disorders, atlantoaxial subluxation, and os odontoideum may contribute to symptom onset, in addition to the congenital small atlas size. Previous reports also stated that spinal cord compression can be suspected if the sagittal canal diameter is less than 14 mm.…”

Section: Abstract: Atlas Hypoplasia Cervical Spinal Cord Myelopathymentioning

confidence: 99%

Concurrent Ossification of the Posterior Atlantoaxial Interlaminar Membrane and Atlas Hypoplasia: A Case Report

Iki

Morofuji

Ozono

et al. 2020

NMC Case Report Journal

View full text Add to dashboard Cite

Is the atlas size associated with the pathophysiology of symptomatic spinal canal stenosis at the C1 level?

Cited by 14 publications

References 22 publications

Classification and Morphometric Features of Pterion in Thai Population with Potential Sex Prediction

Classification and Morphometric Features of Pterion in Thai Population with Potential Sex Prediction

Classification and Surgical Treatment of Developmental Spinal Canal Stenosis at Atlas Level

Concurrent Ossification of the Posterior Atlantoaxial Interlaminar Membrane and Atlas Hypoplasia: A Case Report

Contact Info

Product

Resources

About