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Table 2: Visibility of tract: MRI and operative findings^{^a}
Tract Visibility LDM (n = 12) CDS (n = 10) P Value
Subcutaneous 12 (100%) 10 (100%) –
Intrathecal^{^b} Entirely visible 10 (83%) 1 (10%) .003
Partially visible 2 (17%) 4 (40%)
Poorly visible 0 (0%) 4 (40%)
↵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.

Tract	Visibility	LDM (n = 12)	CDS (n = 10)	P Value
Subcutaneous		12 (100%)	10 (100%)	–
Intrathecal^{^b}	Entirely visible	10 (83%)	1 (10%)	.003
	Partially visible	2 (17%)	4 (40%)
	Poorly visible	0 (0%)	4 (40%)