The amount of a E3 ubiquitin-protein ligase Mdm2 (human) when measured in cerebrospinal fluid. The trait is level of E3 ubiquitin-protein ligase Mdm2 (human) in cerebrospinal fluid (OBA_2058437, an Ontology of Biological Attributes term). Also known as: cerebrospinal fluid E3 ubiquitin-protein ligase Mdm2 (human) amount.