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Table 2 Yang’s Classification System of Severe Spinal Deformities

From: Risk factors for neurological complications in severe and rigid spinal deformity correction of 177 cases

Classification

Neurological Symptoms

MRI Findings

Evoked Potentials

Type A

–

–

–

Type B

–

-or+

-or+

Type C

+

-or+

+

  1. MRI magnetic resonance imaging; No, neurological symptoms not present, no spinal cord malformations found on MRI, no positive change in evoked potentials; Yes, neurological symptoms present, spinal cord malformations found on MRI, positive change in evoked potentials
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BMC Neurology

ISSN: 1471-2377

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