Microscopy image (IMAGE) The Chinese University of Hong Kong Caption Fluorescent tracers penetrated choroid plexus epithelium in the SOX9 mutant, indicating leakiness of the blood-cerebrospinal fluid barrier. Credit CUHK Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.