MRI features are T1 hypo T2 hyper No restricted diffusion on DWI, no contrast enhancement. May be slightly more bighter than CSF as there is no signal loss due to pulsation.
Spinal arachnoid cysts are rare lesions in the pediatric population. Affected patients present with back pain, weakness, and/or gait instability. In children, SACs predominantly develop in the thoracic region and are more likely to occur intradurally, compared with SACs in the general population. Overall outcomes following surgical fenestration or excision of SACs are excellent, with complete remission or improvement of symptoms achieved in 87% of cases