What is the most common lesion to appear as a relatively high T2 signal intradural mass just below the tip of the conus?
What feature of this mass is unusual for a myxopapillary ependymoma?
The large serpiginous flow voids, both related to the mass as well as on the surface of the conus are unusual.
A large intradural mass occupies much of the lumbar canal, below the tip of the conus, with evidence of bony remodelling. It is slightly hyperintense on T2 weighted imaging and isointense to cord on T1 with very large flow voids. Contrast was not administered as the patient had had an allergic reaction.
The mass is associated with very large serpiginous flow voids, both related to the mass as well as on the surface of the conus.