Neurosurgery notes/Spine/Deformity/Classification-Spinal deformity/CSRS-Europe classification

CSRS-Europe classification

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Classification-Spinal deformity
  • General
    • CSRS, Cervical Spine Research Society
  • Type A
    • Patients that have cervical or cervicothoracic kyphosis
    • BUT have reasonable regional and global balance as measured by the C2–7 SVA and the C2–S1 SVA.
  • Type B
    • Patients that have cervical or cervicothoracic kyphosis
      • leading to a large C2–7 SVA and a large C2–S1 SVA → signifying regional and global imbalance.
  • Type C
    • Patients with cervicothoracic kyphosis who can partly compensate with lordosis, but who nevertheless have a global imbalance.
  • Type D
    • Patients who have enough CL to achieve global balance.
notion image
 
Feature / Type
Type A
Type B
Type C
Type D
Deformity type
Cervical or cervicothoracic kyphosis.
Cervical or cervicothoracic kyphosis.
Cervical or cervicothoracic kyphosis.
Patient with cervical lordosis
Regional & Global Balance (as measured by the C2–7 SVA and the C2–S1 SVA)
Have regional and global balance
Regional and global imbalance.
Partly compensated regional and global imbalance.
Have regional and global balance
Baseline C2–7 SVA
Relatively lower.
Greater than Type A but less than Type B
Greater than Type B
Low
Prevalence of CSM (Cervical Spondylotic Myelopathy)
66%.
36%.
12%.
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Incidence of Osteoporotic Vertebrae
22%.
44%.
65%.
ㅤ
Posterior Surgical Approach Utilisation
Utilised 28% of the time.
Utilised 56% of the time.
Utilized 94% of the time.
ㅤ
Shorter Fusion Constructs (Instrumentation not extending below T2)
22%.
44%.
65%.
ㅤ
Mean Osteotomy Grade (Ames Classification)
3.6.
4.1.
5.5.
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Change in C2–7 SVA (Baseline to Postoperative Follow-up)
Increases.
Increases more than Type A.
Increases more than Type B.
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