Table 1.

Stenosis, banding, and dilation classifications of the MS population, some stenotic cases include multiple criteria.

	3D	2D
R Diffuse	2	4
L Diffuse	8	7
R C7/T1 Stenosis	28	53
R C5/C6 Stenosis	11	26
R C2/C3 Stenosis	2	12
L C7/T1 Stenosis	33	54
L C5/C6 Stenosis	27	32
L C2/C3 Stenosis	9	16
R CA Ectasia	6	n/a
L CA Ectasia	21	n/a
R Enhancement Delaya	3	n/a
L Enhancement Delaya	7	n/a
Right Stenosis only	18	27
Left Stenosis only	42	37
R Aplasia	1	n/a
L Aplasia	1	n/a
Right C7/T1 Atresia	2	n/a
Left C7/T1 Atresia	6	n/a
Right C5/C6 Atresia	3	n/a
Left C5/C6 Atresia	9	n/a
Right C2/C3 Atresia	5	n/a
Left C2/C3 Atresia	14	n/a
Right Bandinga	n/a	35
Left Bandinga	n/a	51
Cases where (any level)	11	5
Bilateral Stenosis	33	39

^aWere not included in the stenotic criteria.