The amount of a 4-galactosyl-N-acetylglucosaminide 3-alpha-L-fucosyltransferase 9 (human) when measured in cerebrospinal fluid. The trait is level of 4-galactosyl-N-acetylglucosaminide 3-alpha-L-fucosyltransferase 9 (human) in cerebrospinal fluid (OBA_2081721). Also known as: cerebrospinal fluid 4-galactosyl-N-acetylglucosaminide 3-alpha-L-fucosyltransferase 9 (human) amount.