Some special imaging features, including linear enhancement of the dura adjacent to the mass on contrast-enhanced T1WI and signal voids
within dura on T2WI, were reported.
Oblique lineal signal void
(white arrows) can be seen in the bone marrow edema; these are fracture lines.
MRI of the cervical spine demonstrated a large signal void
in keeping with an extradural spinal AVF.
A keen search is advised when assessing for the signal void
of gas, as can be seen in the setting of pneumatosis or free air; extraluminal gas is more difficult to identify on MR compared to CT.