Legend MRI Spine; Sag T2W (left and center), and Sag T1W (right): A curvilinear signal abnormality within the subcutaneous tissues connecting to the spinal canal at the L4/5 level. Nerve roots are displaced anteriorly within the thecal sac. A hyperintense T2W signal region within the conus.

Legend MRI Spine; Ax PD (left top and bottom and center): A right sided elongated intradural, extra-medullary mass from L1 to L4. Sag T1W Post-Gd Fat Saturation (right): The lesion does not enhance

Legend MRI Spine; Sag T1W (left top and bottom) and Ax PD (right top and bottom): A curvilinear signal abnormality extends ventrally from the skin surface. It courses between the spinous processes of L4 and L5 and traverses the epidural space to enter the thecal sac. Key words: mri congenital developmental tumor neoplasia

Spine Diagnosis: Dorsal dermal sinus with an intradural epidermoid and syrinx of the conus