Cerebrospinal fluid Russell Weller Mar 13, 2023 The fluid surrounding the brain and spinal cord. Synonyms: CSFRelated Articles: Diagnosing Mitochondrial DiseaseMitochondrial Disease TreatmentHow is Mitochondrial Disease Treated?Glossary: Lumbar PunctureAlternative Meanings: Cerebrospinal fluidThe fluid surrounding the brain and spinal cord.