every time my 12 year has a brain mri.. its suggest dandy walker varient and his docters claim he would have to be mentally retarded in order to have this..which he is not... but... has been dx with aspergers,learning issues, spina bifida occultta, tethered cord with syrinx and scoliosis. his symtoms are poor gait, weakness in hand feet and legs, synscope, headaches, learning difficulties, ataxia. degenerative myopia and tremor.. to me it sounds like it has to do with both the brain and spine..he just took a three spine mri's and they came back ok.. my question is there a mild form of dandy walker?? and how come the dr's arent seening this?? also does anybody know symptoms of dandy walker varient??