1 Genetics of Hydrocephalus -- 2 Development of the Cerebrospinal Fluid Pathways During Embryonic and Fetal Life in Humans -- 3 Cerebrospinal Fluid Dynamics -- 4 Pathophysiology of Hydrocephalus -- 5 Modern Imaging of Pediatric Hydrocephalus -- 6 Classification and Definition of Hydrocephalus: Origin, Controversy, and Assignment of the Terminology -- 7 Hydrocephalus: Intracranial Pressure, Myel…