The amount of a S-methyl-5'-thioadenosine phosphorylase (human) when measured in cerebrospinal fluid. The trait is OBA_2058641 (level of S-methyl-5'-thioadenosine phosphorylase (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid S-methyl-5'-thioadenosine phosphorylase (human) amount.