Toddler with back pain and decreased weight bearing

MRI of atypical teratoid rhabdoid tumor (ATRT) of the spine
Sagittal T1 without contrast (left), sagittal T2 (middle) and sagittal T1 with contrast (right) MRI of the lumbar spine shows an extramedullary intradural lesion that is inferior to the conus medullaris and fills the spinal canal from the level of the L1-L3 vertebral bodies. The lesion has heterogenous signal intensity on T2 and heterogenous enhancement with contrast.

The diagnosis was atypical teratoid rhabdoid tumor.