Intramedullary Tumor of Spine STEP 5 STEP 7 STEP 6 STEP 4 STEP 3 STEP 2 STEP 1 PRE OP T2W 2 PRE OP MRI SAG PRE OP MRI 2 WITH CONTRAST PRE OP AXIAL 2 POST OP CLINICAL Intramedullary Tumor of Spine