The amount of a extracellular serine/threonine protein kinase FAM20C (human) when measured in cerebrospinal fluid. The trait is OBA_2059697 (level of extracellular serine/threonine protein kinase FAM20C (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid extracellular serine/threonine protein kinase FAM20C (human) amount.