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Table 1 Demographic and clinical data of the 9 patients

From: Transoral intraarticular cage distraction and C-JAWS fixation for revision of basilar invagination with irreducible atlantoaxial dislocation

Case

Age (year)/Sex

Anomalies in radiology

Previous surgery

Duration between the previous urgery and the revision (month)

Revision cause

Revision surgery

1

59/F

BI, IAAD, AA

OCF (C0–1)

120

IAAD with VSCC

PRI and TARF

2

41/M

BI, IAAD, AA, KFS, Chiari

OCF (C0–2)

36

IAAD with VSCC

PRI, PFD and TARF

3

57/M

BI, IAAD, AA

OCF (C0–3)

180

IAAD with VSCC

PRI and TARF

4

35/F

BI,IAAD, AA, KFS

OCF (C0–2)

65

IAAD with VSCC

PRI and TARF

5

67/F

BI, IAAD, AA, Chiari

OCF (C0–4)

47

IAAD with VSCC

PRI, PFD and TARF

6

27/M

BI, IAAD, AA, KFS, Chiari

OCF (C0–2)

132

IAAD with VSCC

PRI, PFD and TARF

7

36/F

BI, IAAD, AA

OCF (C0–2)

18

IAAD with VSCC

PRI and TARF

8

45/F

BI, IAAD

OCF (C0–3)

144

IAAD with VSCC

PRI and TARF

9

18/M

BI, IAAD, AA, KFS, Chiari

OCF (C0–1)

20

IAAD with VSCC

PRI and TARF

  1. BI basilar invagination; IAAD irreducible atlantoaxial dislocation; AA atlas assimilation; KFS Klippel-Feil syndrome; Chiari Chiari malformation; OCF occipitocervical fusion; PRI posterior removal of instrument; PFD posterior fossa decompression; VSCC ventral spinal cord compression; TARF transoral atlantoaxial reduction and fixation