The amount of a extracellular tyrosine-protein kinase PKDCC (human) when measured in cerebrospinal fluid. The trait is level of extracellular tyrosine-protein kinase PKDCC (human) in cerebrospinal fluid (OBA_2059110, an Ontology of Biological Attributes identifier). Also known as: cerebrospinal fluid extracellular tyrosine-protein kinase PKDCC (human) amount.