Group A | n. | Group B | n. | Group C | n. |
Central lumbar canal stenosis | 4 | Unilateral foraminal and lateral recess stenosis without disc prolapse | 20 | Unilateral foraminal and lateral recess stenosis without disc prolapse | 30 |
Mixed(lateral and central)LSS | 2 | Unilateral foraminal and lateral recess stenosis with posterolateral disc prolapse | 10 | Unilateral foraminal and lateral recess stenosis with posterolateral disc prolapse | 6 |
Degenerative LSS with facet cyst single level | 1 | Bilateral foraminal and lateral recess stenosis without disc prolapse | 13 | Bilateral foraminal and lateral recess stenosis without disc prolapse | 13 |
Degenerative LSS with acute disc prolapse single level | 5 | Bilateral foraminal and lateral recess stenosis with disc prolapse | 4 |
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Unstable LSS with two levels disc prolapse | 3 |
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Unstable LSS with one level disc prolapse | 2 |
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Unstable LSS with degenerative scoliosis small curve from L2 to L5 | 3 |
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Unstable LSS with degenerative scoliosis big curve from L2 to L5 | 1 |
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