The amount of a histidine--tRNA ligase, cytoplasmic (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes entry OBA_2057081 (level of histidine--tRNA ligase, cytoplasmic (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid histidine--tRNA ligase, cytoplasmic (human) amount.