Pre-operative MR scan of case 1, 6, and 7. (A,B: case 1, T2-weighted traverse and T1 enhancement saggital. The lesion located at C2-4, extramedullary, extend extraspinal through interspinal foramen. C,D: case 6, T2-weighted traverse and T1 enhancement saggital. The lesion located at L5-S1, extramedullary, extend extraspinal through interspinal foramen. E,F: case 7, T2-weighted traverse and T1 enhancement saggital. Multiple lesions at L5-S1, extramedullary, extend extraspinal through interspinal foramen.).