title: Circadian variation in 5-hydroxyindoleacetic acid levels in human cerebrospinal fluid.
abstract: Circadian variation of 5-hydroxyindoleacetic acid (5-HIAA) in the ventricular fluid of 5 neurosurgical cases is examined. The 5-HIAA level increases progressively during the day (highest values at 24.00 h) and returns to the initial level the following day at 6.00 h. The results are discussed.
mesh_terms: D000293:Adolescent; D000328:Adult; D002940:Circadian Rhythm; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000134:cerebrospinal fluid*; D008297:Male; D012701:Serotonin / Q000378:metabolism
chemical_list: D012701:Serotonin; D006897:Hydroxyindoleacetic Acid