 There is redemonstration of relative ventral positioning of the thoracic spinal cord with no significant interval change in contour of the cord. Slight differential CSF pulsation is again suggested dorsal to the cord with visualization of traversing vessels and nerve roots along the anterior aspect of the area of differential signal within the thecal sac. This again measures up to 7 mm in greatest thickness on sagittal images. There is again question trace flattening of the dorsal lateral cord bilaterally. The previously seen midline linear possible fibrous strands are not as well delineated on MRI as they were on myelogram.The spine is in normal alignment. The vertebral body and disk heights are well-maintained. No worrisome focal marrow signal abnormality is appreciated. The spinal cord is of normal caliber and signal. The distal spinal cord and conus are within normal limits with the conus terminating at the L1 level.There is no significant disk bulge, herniation, spinal canal or foraminal stenosis within the spine. There is again a very large amount of stool within the enlarged rectum, including a large rounded area of low signal intensity measuring 4.5 x 5.0 cm, likely compacted fecal debris.
1. No significant interval change in appearance of ventral positioning of the thoracic cord with mild contour flattening, with again question of an intradural extramedullary CSF signal intensity collection. Differential remains unchanged, including idiopathic anterior spinal cord herniation/adhesion versus arachnoid cyst, as a cyst could fill in a delayed manner depending on the timing of myelogram following non-radiology service instillation of intrathecal contrast.2. Large amount of fecal debris within the enlarged rectum, including a large stool ball.