Can white matter on brain mri be some kind of connection with my chiari malformation? can it be spinal fluid build up?

Come again?: Brain consists of gray matter (neurons' cell bodies) & white matter (connecting fiber tracts). Chiari malformation has to do with position of cerebellum at base of brain. These 2 things aren't related at all. Finally, can WHAT be spinal-fluid buildup? You'll understand much better if you educate yourself about brain anatomy. There are good sources for laypeople. It's NOT beyond your ability.