The amount of a hydroxymethylglutaryl-CoA synthase, cytoplasmic (human) when measured in cerebrospinal fluid. The trait is level of hydroxymethylglutaryl-CoA synthase, cytoplasmic (human) in cerebrospinal fluid (OBA_2058450). Also known as: cerebrospinal fluid hydroxymethylglutaryl-CoA synthase, cytoplasmic (human) amount.