The amount of a 6-pyruvoyl tetrahydrobiopterin synthase (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes identifier OBA_2058483 (level of 6-pyruvoyl tetrahydrobiopterin synthase (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid 6-pyruvoyl tetrahydrobiopterin synthase (human) amount.