Recurrent subdural hygromas after foramen magnum decompression for Chiari Type I malformation

Abstract

A paediatric case of foramen magnum decompression for Chiari Type I malformation complicated by recurrent subdural hygromas (SH) and raised intracranial pressure without ventriculomegaly is described. SH pathogenesis is discussed, with consideration given to arachnoid fenestration. We summarise possibilities for treatment and avoidance of this unusual consequence of foramen magnum decompression.

Keywords::

• Chiari Type I malformation
• foramen magnum decompression
• subdural hygroma

Declaration of interest: The authors report no declarations of interest. The authors alone are responsible for the content and writing of the paper.