Sacral dimple within the gluteal cleft. Assess for cord tethering. There is a fine hypointense band that extends from the intergluteal cleft to the posterior aspect of the tip off the coccyx. However, there is no evidence of associated mass or cyst. There is also no gross spinal morphologic abnormality, such as an open spinal dysraphism. The tip of the conus medullaris is located at the L2 level and has normal morphology and signal. Furthermore, the spinal cord translates appropriately between the supine and prone positions. There is no thickening or fatty signal along the filum terminale. The cauda equina roots are normally distributed in the thecal sac. The imaged vertebral column alignment is anatomic. The vertebral bone marrow signal is unremarkable. The vertebral body heights are preserved.
1. A fine hypointense band that extends from the intergluteal cleft to the posterior aspect of the tip off the coccyx may represent a fibrotic component of a pilonidal dimple, without associated cyst, mass, or gross dysraphism.2. The conus medullaris is not low-lying and does not appear to be tethered.I personally reviewed the Images and/or procedure with the Resident/Fellow and agree with this report.