Normal anatomy of the cerebellum (left). Chiari I malformation (right). With the size of the posterior fossa too small, the cerebellar tonsils may herniate through the skull into the spinal canal. The tonsils block the flow of CSF (blue) and may cause fluid buildup inside the spinal cord, called a syrinx.Syringomyelia, hydrocephalus, and other complications.verview. Chiari I malformation is a condition in which the bony space enclosing the lower part of the brain is smaller than normal. Crowding causes the cerebellar tonsils to push through the skull and down into the spinal canal.
Silverton, Oregon. Silverton is a city in Marion County, Oregon, United States. The city is situated along the 45th parallel about 12 miles (19 km) northeast of Salem, in the eastern margins of the broad alluvial plain of the Willamette Valley.
Residents of a large swath of South-Eastern Montgomery County have Silver Spring mailing addresses. This area extends roughly from the Washington, D.C., Prince George's County, Maryland and Howard County, Maryland lines to the west,north and east, and Rock Creek Park and Plyers Mill Road to the west and north-west. These boundaries make Silver Spring larger in area than any city in Maryland except for Baltimore.