Conus cyst, epilepsy For the purposes of numbering, there are 5 lumbar type vertebral bodies. Again seen is a mildly expansile T2 hyperintense focus involving the distal thoracic cord at the T12 level measuring approximately 4 x 3 x 10 mm in the AP, transverse, and craniocaudal dimensions. There is suggestion of communication with the central canal superiorly (better seen on prior study sag T2 image 6). No abnormal enhancement is appreciated on the postcontrast sequences.Vertebral body heights are normal. Alignment is normal. Bone marrow signal is normal. No significant spinal canal or neural foraminal stenosis is seen at any level. Conus is in normal position at the L1-L2 level. No evidence of filar lipoma or other lesions involving the cauda equina or filum terminale. No evidence of tethered cord.
Unchanged appearance of the minimally expansile cystic focus/defect involving the dorsal cord in the midline at the T10 level. Finding is favored to represent a developmental malformation, possibly related to incomplete neural tube closure (although the osseous elements are intact) or ventricularis terminalis cyst, and less likely myelomalacia related to prior injury or nonenhancing cystic neoplasm.