The amount of a nucleoside diphosphate phosphatase ENTPD5 (human) when measured in cerebrospinal fluid. The trait is level of nucleoside diphosphate phosphatase ENTPD5 (human) in cerebrospinal fluid (OBA_2056343, an Ontology of Biological Attributes id). Also known as: cerebrospinal fluid nucleoside diphosphate phosphatase ENTPD5 (human) amount.