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Clinical Significance and Prognosis of Idiopathic Syringomyelia
Masaya Nakamura
※1
Kazuhiro Chiba
※1
Ken Ishii
※1
Hiroto Ogawa
※1
Kansei Takaishi
※1
Morio Matsumoto
※1
Yoshiaki Toyama
※1
※1 Department of Orthopaedic Surgery,Keio University
Ten cases of idiopathic syringomyelia without any definite pathogenic lesions have been reported. The type of syringomyelia diagnosed on MRI findings was“central type”in 6,“enlarged type”in 3,and“deviated type”in 1 case. The neurological deficits were severe in the patients with the enlarged type than in those with the other two types. In two patients with an enlarged syrinx,syrinx-subarachnoid shunt was performed because of severe neurological deficits,resulted in no neurological deterioration. Although spontaneous resolution of the syrinx was observed in one case that was treated conservatively,no functional recovery was observed. In the patients with a central or deviated syrinx,there were no significant changes in either the size of syrinx or neurological deficit during the follow-up period. While central and deviated syrinx should be treated conservatively,enlarged syrinx should be treated surgically to prevent further neurological deterioration.
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