The amount of a N-acylneuraminate-9-phosphatase (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes id OBA_2059978 (level of N-acylneuraminate-9-phosphatase (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid N-acylneuraminate-9-phosphatase (human) amount.