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• Clinical Article •
Magnetic resonance imaging for the diagnosis of Hirayama disease
ZHAI Shao-zhi  DAI Hai-yang  LIU Guo-rong  XIAO Ye-yu  HONG Bi-kai  WU Ren-hua 

DOI:10.3969/j.issn.1674-8034.2013.04.008.


[Abstract] Objective: To investigate the MRI characteristic of the spinal cord in neutral position and fully flexed position of the neck, and to analyze diagnostic value of the subdural space in fully flexed position.Materials and Methods: MRI examinations in neutral neck position and a fully flexed neck position were performed in 9 cases of Hirayama disease and 10 normal control subjects. The MRI features of Hirayama were analyzed and the subdural spaces in the fully flexed position were measured in the patients and control groups.Results: In the neutral position, the cervical curvature become straighten lower cervical cord become atrophy and flattening for the patient group. In a fully flexed position, the patient group showed forward displacement and flattening of the lower cervical cord. There was a crescent-shaped abnormal signal in the subdural space and showed significant enhancement after contrast medium administration. The subdural space between the patients (6.8±0.5) mm and control (4.2±0.4) mm respectively and showed significant difference (P<0.01).Conclusions: The subdural space, which was broadened and seen abnormal signals in a fully flexed position, have a certain value combined with neutral and fully flexed position MR features in the diagnosis of Hirayama.
[Keywords] Hirayama disease；Magnetic resonance imaging；cervical vertebra；fully flexed position

ZHAI Shao-zhi Department of Medical Imaging, Guangdong Province HuiZhou Municipal Central Hospital, Huizhou 516001, China

DAI Hai-yang Department of Medical Imaging, Guangdong Province HuiZhou Municipal Central Hospital, Huizhou 516001, China

LIU Guo-rong Department of Medical Imaging, Guangdong Province HuiZhou Municipal Central Hospital, Huizhou 516001, China

XIAO Ye-yu Department of Medical Imaging, The Second Affiliated Hospital of Shantou University Medical College, Shantou 515041, China

HONG Bi-kai Department of Medical Imaging, The Second Affiliated Hospital of Shantou University Medical College, Shantou 515041, China

WU Ren-hua* Department of Medical Imaging, The Second Affiliated Hospital of Shantou University Medical College, Shantou 515041, China

*Correspondence to: Wu RH, E-mail: rhwu@stu.edu.cn

Conflicts of interest   None.

Received  2013-05-30
Accepted  2013-06-26
DOI: 10.3969/j.issn.1674-8034.2013.04.008
DOI:10.3969/j.issn.1674-8034.2013.04.008.

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