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.
Lumberton, North Carolina. Lumberton is a city in Robeson County, North Carolina, United States. The population has grown to 21,542 in the 2010 census from 20,795 in the 2000 census. It is the county seat of Robeson County.[4] Lumberton, located in southern North Carolina's Inner Banks region, is located on the Lumber River. Founded in 1787 by John Willis, an officer in the American Revolution, Lumberton was originally a shipping point for lumber used by the Navy, which was sent downriver to Georgetown, South Carolina.