Dandy Walker Variant Help

Hello

I'm hoping you could help me.

I'm enquiring about a 14 month old baby girl diagnosed with mild dandy walker variant. she has extremey fine motor skill, but is slightly behind with crawing/walking ect. Is there any
evidence that the cyst will grow as she grows slowing the current progress she is making.
We are hoping that her current progress will continue at it's current rate and not begin to degrade.
Any advice you could give us would be greatly appreciated.

Thanks
Dan