The Critical Role of Wnt/β-catenin Signaling in Choroid Plexus Tumorigenesis Background Introduction The choroid plexus (CHP) is a secretory epithelial structure located in the brain ventricles, primarily responsible for the secretion of cerebrospinal fluid (CSF) and the establishment of the blood-CSF barrier. Choroid plexus tumors (CPTs) are rare ...