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Last Updated: September 27, 2018

McCormick Classification
Functional classification for intramedullary spinal cord tumors
Grade I Neurologically, 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. Arm involvement possible. Partially independent.
Grade IV As in grade III with arms affected, usually not independent
Simpson Grade
Classification for surgical resection of meningiomas
Grade I Macroscopically complete removal, excision includes dural attachment, abnormal bone, and venous sinus (if involved)
Grade II Macroscopically complete removal, with coagulation of dural attachment
Grade III Macroscopically complete removal, without coagulation of dural attachment or extradural extensions
Grade IV Partial removal
Grade V Biopsy or simple decompression

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