Which of the following leads to 'communicating' hydrocephalus?: (A) Choroid plexus papilloma, (B) Arnold Chiari malformation, (C) Dandy walker malformation, (D) Vein of Galen malformation
Answer is A. In Choroid plexus papilloma- 'communicating' hydrocephalus occurs due to increased production of CSF. Rest are causes of obstructive hydrocephalus- obstruction to flow of CSF