Scalpel sign (spinal cord)
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At the time the article was created Frank Gaillard had no recorded disclosures.View Frank Gaillard's current disclosures
At the time the article was last revised Subhan Iqbal had no recorded disclosures.View Subhan Iqbal's current disclosures
The scalpel sign has been recently described in dorsal thoracic arachnoid web on sagittal MRI spine studies. It relates to focal distortion of the thoracic cord, appearing anteriorly displaced. The enlarged dorsal CSF space mimics the profile of a surgical scalpel.
It is helpful in distinguishing cases where the thoracic cord is focally anteriorly displaced, a finding seen in a couple of other conditions in addition to dorsal thoracic arachnoid web 2, namely ventral cord herniation and the presence of a dorsal arachnoid cyst.
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