The amount of a UDP-N-acetylhexosamine pyrophosphorylase (human) when measured in cerebrospinal fluid. The trait is level of UDP-N-acetylhexosamine pyrophosphorylase (human) in cerebrospinal fluid (Ontology of Biological Attributes entry OBA_2058970). Also known as: cerebrospinal fluid UDP-N-acetylhexosamine pyrophosphorylase (human) amount.