Morphological central nervous system abnormality Abnormal cerebrospinal fluid morphology UMLS:C0151583 Abnormality of the cerebrospinal fluid Abnormal CSF findings HP:0002921 The cerebrospinal fluid (CSF) is secreted by the choroid plexus, and flows uninterrupted throughout the central nervous system (the central cerebrospinal canal of the spinal cord and through the four interconnected cerebral ventricles in the brain). An abnormality of the cerebrospinal fluid (CSF). Abnormality of the CSF