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Oh, Lee, Kim, Yoon, Park, and Park: Increased Detection Rate of Syringomyelia by Whole Spine Sagittal Magnetic Resonance Images: Based on the Data from Military Conscription of Korean Young Males
Original Article
Neuroradiology
Journal of the Korean Society of Radiology

Journal of the Korean Society of Radiology 2012; 67(3): 149-156.

Published online: 7 September 2012

DOI: https://doi.org/10.0000/jksr.2012.67.3.149

Increased Detection Rate of Syringomyelia by Whole Spine Sagittal Magnetic Resonance Images: Based on the Data from Military Conscription of Korean Young Males

Chang Hyun Oh, MD1, 2, Myoung Seok Lee, MD1, Yeo Ju Kim, MD3, Seung Hwan Yoon, MD2, Hyeong-Chun Park, MD2, Chong Oon Park, MD2

1Seoul Regional Military Manpower Administration, Seoul, Korea.

2Department of Neurosurgery, Inha University Hospital, College of Medicine, Inha University, Incheon, Korea.

3Department of Radiology, Inha University Hospital, College of Medicine, Inha University, Incheon, Korea.

Corresponding author: Seung Hwan Yoon, MD. Department of Neurosurgery, Inha University Hospital, College of Medicine, Inha University, 27 Inhang-ro, Jung-gu, Incheon 400-711, Korea. Tel. 82-32-890-2370, Fax. 82-32-890-2374, nsyoon@gmail.com

Received 2 April 2012       Accepted 4 July 2012

Copyright © 2012 The Korean Society of Radiology

Abstract

Purpose

We compared the detection rate of syringomyelia according to the type of magnetic resonance (MR) images among the Korean military conscription.

Materials and Methods

Among the total of 238910 examinees (males aged 18 to 32 years old) from January 2008 to December 2011, the examinees with conventional single lesion MR images (cervical, thoracic, and lumbar) with and without whole spine sagittal T2-weighted MR images (WSST2I) totaled 1206 cases, and syringomyelia was observed in 24 cases. The detection rate of syringomyelia according to the MR protocol (the presence of WSST2I or not) was done through analysis by annually and the clinical characters of syringomyelia was reviewed.

Results

The estimated prevalence of syringomyelia was approximately 10.0 cases per 100000 people. The detection rate was increased annually when the WSST2I proportion was increased (from 3.4 to 14.9 cases per 100000 persons, r = 0.939, p = 0.018). Clinical character of syringomyelia was ambiguous with other spinal diseases. The most affected spinal level was C5 to C7 (83%), and most cases were non-communicating syringomyelia with benign central canal widening (79%).

Conclusion

Whole spine sagittal MR image is useful to detect coexisting spinal diseases such as syringomyelia, and most syringomyelia in young males was benign hydromyelia. A whole spine sagittal MR image is recommended to increase the detection of syringomyelia.

Keywords: Syringomyelia, Hydromyelia, Whole Spine Sagittal MR Images, Korea, Male

Figures and Tables

Fig. 1
Three cases of syringomyelia check by C spine regional magnetic resonance (MR). Syringomyelia is a well demarcated cavity (arrows) with an increase signal on a T2 weighted image on a MR image within the spinal cord in the level of C6 (A), C5-6 (B), and C3-6 (C).
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Fig. 2
The whole spine sagittal magnetic resonance images of a 19-year-old male with chronic neck and back pain. There is no definite lesion in the thoracolumbar image (A), but the syringomyelia (arrow) is observed at the level of T2 in the cervicothoracic image (B).
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Fig. 3
The whole sagittal magnetic resonance images of a 20-year-old male with back pain. There is multiple degenerative disc protrusion observed in the lumbar region (A), and the syringomyelia (arrow) is observed at the level of C6 in the whole spine sagittal MR images (B).
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Fig. 4
The relation between the annual proportion (group B / group A + B) and the annual prevalence of syringomyelia according to the conscription year. Group A is conventional regional magnetic resonance (MR) images without whole spine sagittal T2-weighted MR images (WSST2I), and group B is conventional regional MR images with WSST2I or conventional regional MR including both the cervical and lumbar spine region.
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Table 1
Type of Spinal MR Images and Detection of Syringomyelia according to the Conscription Years
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Note.-MR = magnetic resonance, WSST2I = whole spine sagittal T2-weighted MR images

Table 2
Syringomyelia Cases with Level of Syringomyelia, Conscription Year, Type of MR Images, Clinical Symptoms, and Combine Disease
jksr-67-149-i002

Note.-CDDD = cervical degenerative disc disease, MR = magnetic resonance, WSST2I = whole spine sagittal T2-weighted MR images

Table 3
Syringomyelia Cases with Level of Syringomyelia, Syringomyelia Type, Central Canal Widening and 4th Ventricle
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