PT  - JOURNAL ARTICLE
AU  - Chen, C J
AU  - Chen, C M
AU  - Wu, C L
AU  - Ro, L S
AU  - Chen, S T
AU  - Lee, T H
TI  - Hirayama disease: MR diagnosis.
DP  - 1998 Feb 01
TA  - American Journal of Neuroradiology
PG  - 365--368
VI  - 19
IP  - 2
4099  - http://www.ajnr.org/content/19/2/365.short
4100  - http://www.ajnr.org/content/19/2/365.full
SO  - Am. J. Neuroradiol.1998 Feb 01; 19
AB  - We report the MR findings in two cases of Hirayama disease, a kind of cervical myelopathy related to flexion movements of the neck. In flexion MR studies, we can see the striking and pathognomonic picture of anterior shifting of posterior dura at the lower cervical spinal canal. In nonflexion studies, we find that asymmetric cord atrophy, especially at the lower cervical cord, though subtle, is highly suggestive of Hirayama disease. When it is seen, a flexion MR study is warranted to prove this diagnosis.