Grade 1: Predominant thoracic central (axial) pain

Grade 2: Predominant thoracic radicular pain

Grade 3A: Significant axial and thoracic radicular pain

Grade 3B: Significant axial and lower leg pain with or without thoracic radicular pain

Grade 4: Myelopathy but not significant motor weakness

Grade 5: Paretic or paralytic (significant motor weakness)


Provide an explanation for key principles and pertinent aspects of the classification


Insert figures illustrating the classification


Anand N, Regan JJ. Video-assisted thoracoscopic surgery for thoracic disc disease: Classification and outcome study of 100 consecutive cases with a 2-year minimum follow-up period. Spine. 2002 Apr. 15;27(8):871-879.