The amount of a tRNA (cytosine(38)-C(5))-methyltransferase (human) when measured in cerebrospinal fluid. The trait is level of tRNA (cytosine(38)-C(5))-methyltransferase (human) in cerebrospinal fluid (OBA_2055998). Also known as: cerebrospinal fluid tRNA (cytosine(38)-C(5))-methyltransferase (human) amount.