Which of the following is not a feature of extramedullary tumour?
Sacral sparing is a feature of intramedullary tumors, not extra medullary tumors. So sacral sparing is the single best answer of choice. Ref: Harrison's Principles of Internal Medicine, 16th Edition, Page 2440
Early Coicospinal signs and paralysis
Root pain or midline Back -pain
Abnormal CSF
Sacral sparing