Table 1 the classification of three-level HS
Classification | Description |
|---|---|
Type I | One-level CDA and two-level ACDF |
Type Ia | Contiguous three-level HS. CDA was performed at the superior lesion segment, and ACDF was performed at the intermediate and inferior lesion segments |
Type Ib | Contiguous three-level HS. CDA was performed at the intermediate lesion segment, and ACDF was performed at the superior and inferior lesion segments |
Type Ic | Contiguous three-level HS. CDA was performed at the inferior lesion segment, and ACDF was performed at the superior and intermediate lesion segments |
Type Id | Noncontiguous three-level HS |
Type II | Two-level CDA and one-level ACDF |
Type IIa | Contiguous three-level HS. CDA was performed at the superior and intermediate lesion segments, and ACDF was performed at the inferior lesion segment |
Type IIb | Contiguous three-level HS. CDA was performed at the superior and inferior lesion segments, and ACDF was performed at the intermediate lesion segment |
Type IIc | Contiguous three-level HS. CDA was performed at the intermediate and inferior lesion segments, and ACDF was performed at the superior lesion segment |
Type IId | Noncontiguous three-level HS |