open access

Vol 74, No 3 (2015)
CASE REPORTS
Published online: 2015-09-02
Submitted: 2014-09-21
Accepted: 2014-11-03
Get Citation

Chiari type I malformation with high foramen magnum anomaly

H. Ulutabanca, N. Acer, A. Küçük, S. Doğan, A. Tümtürk, A. Kurtsoy, A. Sağıroğlu, M. Bilgen
DOI: 10.5603/FM.2015.0059
·
Pubmed: 26339825
·
Folia Morphol 2015;74(3):402-406.

open access

Vol 74, No 3 (2015)
CASE REPORTS
Published online: 2015-09-02
Submitted: 2014-09-21
Accepted: 2014-11-03

Abstract

A 14-year-old male with a neck pain and hypoesthesia in the upper extremities was diagnosed with Chiari type I malformation (CMI) and syringomyelia. The posterior part of the occipital bone was removed via cranio-cervical decompression. The accuracy of measuring the posterior cranial fossa (PCF) and foramen magnum (FM) dimensions were evaluated and compared with the literature. The linear PCF and FM dimensions as well as volumes were measured using computed tomography (CT) images with different techniques. The volume data were compared with similar data from literature. Use of the posterior fossa approach remains controversial when treating patients with minor little brain stem dislocation, small PCF, and or incomplete C1, but the approach can easily be applied if FM and PCF sizes are known. Linear measurements that were assessed for concordance with CT measurements had the best agreement. Quantification of PCF volume and high FM should be taken into consideration for differential diagnosis of tonsillar herniation and prediction of surgical outcome in CMI.

Abstract

A 14-year-old male with a neck pain and hypoesthesia in the upper extremities was diagnosed with Chiari type I malformation (CMI) and syringomyelia. The posterior part of the occipital bone was removed via cranio-cervical decompression. The accuracy of measuring the posterior cranial fossa (PCF) and foramen magnum (FM) dimensions were evaluated and compared with the literature. The linear PCF and FM dimensions as well as volumes were measured using computed tomography (CT) images with different techniques. The volume data were compared with similar data from literature. Use of the posterior fossa approach remains controversial when treating patients with minor little brain stem dislocation, small PCF, and or incomplete C1, but the approach can easily be applied if FM and PCF sizes are known. Linear measurements that were assessed for concordance with CT measurements had the best agreement. Quantification of PCF volume and high FM should be taken into consideration for differential diagnosis of tonsillar herniation and prediction of surgical outcome in CMI.

Get Citation

Keywords

foramen magnum, posterior cranial fossa, computed tomography, Chiari malformation

About this article
Title

Chiari type I malformation with high foramen magnum anomaly

Journal

Folia Morphologica

Issue

Vol 74, No 3 (2015)

Pages

402-406

Published online

2015-09-02

DOI

10.5603/FM.2015.0059

Pubmed

26339825

Bibliographic record

Folia Morphol 2015;74(3):402-406.

Keywords

foramen magnum
posterior cranial fossa
computed tomography
Chiari malformation

Authors

H. Ulutabanca
N. Acer
A. Küçük
S. Doğan
A. Tümtürk
A. Kurtsoy
A. Sağıroğlu
M. Bilgen

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