cerebellar simptoms

Hy,i would like to ask you something about my doughter
She is 2,8 years old and sne soufers from neurological disorders with cerebellar simptomes(mild ataxia,hypotonia,tremor)This is the second time that this condition occured, first she had only tremor at 1 year age and all the results were normal so she had some simptomatic treatment and after 2-3 weeks the simptoms were gone and she was rehabiliting ever since september 2010 when after stomach flu with fever and dehidratation the simptoms were back again but this time stronger and the tretmant didnt work.The condition was prodredieting till december when we started to do all kind of tests and the results was only abnormal in the mri imaging.  In the white brain mass as in the level of bassal ganglias in T2 and FLER secvencies are simetric hipersignal changes,also in the region of the mesencefalon,pons and dentatus nucleus in the cerebellum billateraly,This changes can be as a result of ADEM or metabolic dissorders.So please tell me something about MRi findings and your sugestion becouse all other results were normal and the doctors are not shure yet what is the specific dissorder in this moment and the treatment