<prompt> Which of the following is not a cause of communicating hydrocephalus?Choroid plexus papillomaVein of Galen malformationAchondroplasiaMeningeal metastasis  <response>: - Vein of Galen causes Obstructive or Non-communicating hydrocephalus. Causes: COMMUNICATING HYDROCEPHALUS NON-COMMUNICATING HYDROCEPHALUS C - Choroid plexus papilloma A - Achondroplasia M - Meningeal malignancy or metastasis P - Post hemorrhagic M - Mass lesion ICSOL A - Abscess A - Aqueductal stenosis A - Arnold Chiari malformation D - Dandy walker malformations H - Hematoma I - Infections Toxoplasma, mumps, Neurocysticercosis V - Vein of Galen malformations 