McCormick classification

Intramedullary spinal cord tumors

Grade I

Neurologically normal, mild focal deficits, normal gait.

Grade II

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

Grade III

Moderate neurological deficit, requires cane for ambulation. Minor involvement of arms possible. Patient is partially independent.

Grade IV

As grade III with arms affected, usually not independent.


The Neurosurgeon's Handbook. Ed. G Samandouras. Oxford University Press, 2010.