Table 3.

Characteristics of syringomyelia before and after surgery

Syrinx	Case 1	Case 2	Case 3
Affected levels	C6-T6	C5-C7	C1-T8
Length b.s. (cm)	14.5	3.4	26
Length a.s. (cm)	0	2.4	0
Maximal AP diameter b.s. (cm)	0.6	0.34	0.55
Maximal AP diameter a.s. (cm)	0	0.34	0
Maximal lateral diameter b.s. (cm)	0.53	0.47	0.44
Maximal lateral diameter a.s. (cm)	0	0.4	0
Volume b.s. (cm3)	1.425	0.348	2.378
Volume a.s. (cm3)	0	0.149	0

b.s. before surgery, a.s after surgery