Cowden Syndrome 5, also known as cws5, is related to spinocerebellar ataxia 34 and spastic quadriplegic cerebral palsy. An important gene associated with Cowden Syndrome 5 is PIK3CA (Phosphatidylinositol-4,5-Bisphosphate 3-Kinase Catalytic Subunit Alpha), and among its related pathways/superpathways are PI3K / Akt Signaling and Fatty acyl-CoA biosynthesis. Affiliated tissues include thyroid and breast, and related phenotypes are intellectual disability and intellectual disability, mild