IT depends where the cysts are - if they are within the
substanceDrug abuse of the brain, then a tumor should be excluded by doing a contrast scan and/or a biopsy
If they are outside the brain but inside the
skullCranial ct scan
Malignant otitis externa
Skull
Skull anatomy
Skull of a newborn
Skull of an adult
Skull x-ray they may be
subarachnoidSubarachnoid hemorrhage cysts which are common in this area, and usually not operated on unless compressing brain strucutres and causing a neurological deficit. Usually they remain the same over time and are a common 'incidental' finding on MRI, and do not become maligant.
I'm not sure what the 'short spinal cord' is - there is some normal varaitiona nd the spinal cord can end at different levels. They may mean a 'tethered cord' but I do not have the scan so I cannot interpret this. This means that the spinal cord is tied at the end to the surrounding soft tissue, then growing causes the cord to become stretched causing toe walking and maybe some weakness or spasticity. The MRI should diagnose this.
Good luck