The amount of a SAM domain-containing protein SAMSN-1 (human) when measured in cerebrospinal fluid. The trait is level of SAM domain-containing protein SAMSN-1 (human) in cerebrospinal fluid (Ontology of Biological Attributes id OBA_2081241). Also known as: cerebrospinal fluid SAM domain-containing protein SAMSN-1 (human) amount.