part of part of has part has part characteristic of inheres in has modifier 5-methyltetrahydrofolate Abnormality of folate metabolism Decreased CSF 5-methyltetrahydrofolate concentration 2013-11-23T03:40:41Z HP:0012336 Cerebral folate deficiency UMLS:C2751584 HP:0012446 Low CSF 5-methyltetrahydrofolate A reduced concentration of 5-methyltetrahydrofolate(2-) in the cerebrospinal fluid (CSF). 5-methyltetrahydrofolate is the active folate metabolite. UMLS:C4022901 SNOMEDCT_US:711403001 Reduced CSF 5-methyltetrahydrofolate concentration Abnormal CSF metabolite concentration abnormal decreased amount cerebrospinal fluid