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Table 3: 
Attachment site of tract: MRI and operative findingsa
TractAttachment SiteLDM (n = 12)CDS (n = 10)P Value
MRIOPMRIOP
IntrathecalbConus medullaris12 (100%)12 (100%)2 (20%)3 (30%).004
Filum terminale/nerve root––2 (20%)2 (20%)
Dermoid/epidermoid tumor–––4 (40%)
Not availablec5 (50%)
No extension into the spinal canal––1 (10%)1 (10%)
  • Note:—Op indicates operative findings.
  • ↵a Data are number of patients, with percentages in parentheses.
  • ↵b Because the tract of 1 patient with CDS was revealed to end in the dura mater at the operation and there was no tract in the intrathecal area, only 9 CDS tracts were assessed with regard to visibility and attachment site in its intrathecal portion.
  • ↵c The attachment sites of the tracts could not be evaluated on MRI.