Peter is a mischievous 12-year-old boy with an irrepressible rebellious streak, but in the bleak London orphanage where he has lived his whole life those qualities do not exactly fly....
Chiari malformation, also known as an Arnold-Chiari malformation, is a congenital (present at birth) defect occurring in the back of the head where the brain and spinal cord connect.There are four types of Chiari malformations:1  Type 1 â Occurring when the base of the skull and upper spinal area do not form properly, a type 1 Chiari malformation commonly goes unnoticed until problems arise in the adolescent or adult years of life.here are four types of Chiari malformations: 1  Type 1 â Occurring when the base of the skull and upper spinal area do not form properly, a type 1 Chiari malformation commonly goes unnoticed until problems arise in the adolescent or adult years of life.
Chiari I malformation describes low-lying cerebellar tonsils without other congenital brain malformations. Chiari II malformation is a complex anomaly with skull, dura, brain, spine and spinal cord manifestations, which usually presents in early childhood or in infancy.