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MRI presentation of a cervical pilocytic astrocytoma grade I of the World Health Organization (WHO) grading system (yellow arrow) before (a) and after surgical resection (b) in a 14-year old girl. Surgical situs shows opening of the dura (c), CUSA (cavitronic ultrasonic surgical aspirator) de-bulking (d), opened cavitying of the spinal cord with partially removed tumor (e), closure of the spinal cord (f) and dural closure (g).
