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The odontoid process invagination in normal subjects, Chiari malformation and Basilar invagination patients: Pathophysiologic correlations with angular craniometry.
Surg Neurol Int. 2015; 6:118.SN

Abstract

BACKGROUND

Craniometric studies have shown that both Chiari malformation (CM) and basilar invagination (BI) belong to a spectrum of malformations. A more precise method to differentiate between these types of CVJM is desirable. The Chamberlain's line violation (CLV) is the most common method to identify BI. The authors sought to clarify the real importance of CLV in the spectrum of craniovertebral junction malformations (CVJM) and to identify possible pathophysiological relationships.

METHODS

We evaluated the CLV in a sample of CVJM, BI, CM patients and a control group of normal subjects and correlated their data with craniocervical angular craniometry.

RESULTS

A total of 97 subjects were studied: 32 normal subjects, 41 CM patients, 9 basilar invagination type 1 (BI1) patients, and 15 basilar invagination type 2 (BI2) patients. The mean CLV violation in the groups were: The control group, 0.16 ± 0.45 cm; the CM group, 0.32 ± 0.48 cm; the BI1 group, 1.35 ± 0.5 cm; and the BI2 group, 1.98 ± 0.18 cm. There was strong correlation between CLV and Boogard's angle (R = 0.82, P = 0.000) and the clivus canal angle (R = 0.7, P = 0.000).

CONCLUSIONS

CM's CLV is discrete and similar to the normal subjects. BI1 and BI2 presented with at least of 0.95 cm CLV and these violations were strongly correlated with a primary cranial angulation (clivus horizontalization) and an acute clivus canal angle (a secondary craniocervical angle).

Authors+Show Affiliations

Department of neurosurgery, Hospital do servidor público do estado de São Paulo, 1800 Pedro de Toledo, 04039-901, São Paulo, Capital, Brazil, 551145738379.Department of neurosurgery, Hospital do servidor público do estado de São Paulo, 1800 Pedro de Toledo, 04039-901, São Paulo, Capital, Brazil, 551145738379.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26229733

Citation

Ferreira, Jânio A., and Ricardo V. Botelho. "The Odontoid Process Invagination in Normal Subjects, Chiari Malformation and Basilar Invagination Patients: Pathophysiologic Correlations With Angular Craniometry." Surgical Neurology International, vol. 6, 2015, p. 118.
Ferreira JA, Botelho RV. The odontoid process invagination in normal subjects, Chiari malformation and Basilar invagination patients: Pathophysiologic correlations with angular craniometry. Surg Neurol Int. 2015;6:118.
Ferreira, J. A., & Botelho, R. V. (2015). The odontoid process invagination in normal subjects, Chiari malformation and Basilar invagination patients: Pathophysiologic correlations with angular craniometry. Surgical Neurology International, 6, 118. https://doi.org/10.4103/2152-7806.160322
Ferreira JA, Botelho RV. The Odontoid Process Invagination in Normal Subjects, Chiari Malformation and Basilar Invagination Patients: Pathophysiologic Correlations With Angular Craniometry. Surg Neurol Int. 2015;6:118. PubMed PMID: 26229733.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The odontoid process invagination in normal subjects, Chiari malformation and Basilar invagination patients: Pathophysiologic correlations with angular craniometry. AU - Ferreira,Jânio A, AU - Botelho,Ricardo V, Y1 - 2015/07/08/ PY - 2014/11/02/received PY - 2015/04/14/accepted PY - 2015/8/1/entrez PY - 2015/8/1/pubmed PY - 2015/8/1/medline KW - Arnold–Chiari malformation KW - basilar impression KW - cephalometry KW - platybasia SP - 118 EP - 118 JF - Surgical neurology international JO - Surg Neurol Int VL - 6 N2 - BACKGROUND: Craniometric studies have shown that both Chiari malformation (CM) and basilar invagination (BI) belong to a spectrum of malformations. A more precise method to differentiate between these types of CVJM is desirable. The Chamberlain's line violation (CLV) is the most common method to identify BI. The authors sought to clarify the real importance of CLV in the spectrum of craniovertebral junction malformations (CVJM) and to identify possible pathophysiological relationships. METHODS: We evaluated the CLV in a sample of CVJM, BI, CM patients and a control group of normal subjects and correlated their data with craniocervical angular craniometry. RESULTS: A total of 97 subjects were studied: 32 normal subjects, 41 CM patients, 9 basilar invagination type 1 (BI1) patients, and 15 basilar invagination type 2 (BI2) patients. The mean CLV violation in the groups were: The control group, 0.16 ± 0.45 cm; the CM group, 0.32 ± 0.48 cm; the BI1 group, 1.35 ± 0.5 cm; and the BI2 group, 1.98 ± 0.18 cm. There was strong correlation between CLV and Boogard's angle (R = 0.82, P = 0.000) and the clivus canal angle (R = 0.7, P = 0.000). CONCLUSIONS: CM's CLV is discrete and similar to the normal subjects. BI1 and BI2 presented with at least of 0.95 cm CLV and these violations were strongly correlated with a primary cranial angulation (clivus horizontalization) and an acute clivus canal angle (a secondary craniocervical angle). SN - 2229-5097 UR - https://www.unboundmedicine.com/medline/citation/26229733/The_odontoid_process_invagination_in_normal_subjects_Chiari_malformation_and_Basilar_invagination_patients:_Pathophysiologic_correlations_with_angular_craniometry_ L2 - http://www.surgicalneurologyint.com/article.asp?issn=2152-7806;year=2015;volume=6;issue=1;spage=118;epage=118;aulast=Ferreira DB - PRIME DP - Unbound Medicine ER -
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