McCormick functional classification of intramedullary spinal cord tumours (simplified)

I Neurologically normal, mild focal deficits, normal gait

II Sensorimotor deficits affecting function, severe pain, gait difficulties, can still walk

III Moderate neurological deficit, reques cane for ambulation, +/- arms affected, +/- imdependent

IV As above + arms affected, usually not independent

see Modified McCormick scale