Hydrocephalus Due to Congenital Stenosis of Aqueduct of Sylvius, also known as aqueductal stenosis, is related to hydrocephalus and hydrocephalus, congenital, x-linked, and has symptoms including muscle spasticity An important gene associated with Hydrocephalus Due to Congenital Stenosis of Aqueduct of Sylvius is L1CAM (L1 Cell Adhesion Molecule), and among its related pathways/superpathways are Neuroscience and Neural Stem Cells and Lineage-specific Markers. Affiliated tissues include pineal and brain, and related phenotypes are intellectual disability and hydrocephalus