Abstract Title:

Cerebral venous sinus thrombosis associated with hyperhomocysteinemia due to combined deficiencies of folate and vitamin B12.

Abstract Source:

Rinsho Shinkeigaku. 2016 Mar 8 ;56(2):116-9. Epub 2016 Jan 21. PMID: 26797484

Abstract Author(s):

Yuhei Kanaya, Shuichiro Neshige, Makoto Takemaru, Yuji Shiga, Shinichi Takeshima, Masaru Kuriyama

Article Affiliation:

Yuhei Kanaya


A 63-year-old man was admitted to our hospital because of convulsive seizures. Radiological examinations revealed cerebral venous sinus thrombosis in the anterior part of the superior sagittal sinus. He had marked hyperhomocysteinemia (93.5 nmol/ml) due to combined deficiencies of folate and vitamin B12. He was T/T homozygous for methylene tetrahydrofolate reductase C677T polymorphism. He received a supplement therapy of vitamins. First, he was administered folate orally. After 3 months, the serum level of homocysteine decreased to22.6 nmol/ml (an 86% reduction), but was still above the normal level. Next, an additional supplement therapy of vitamin B12 lowered the homocysteine level to normal (12.3 nmol/ml) after 4 months. These results showed that the increase of homocysteine levels in this patient was mainly caused bythe deficiency of folate. Additionally, acquired risk factors like vitamin deficiencies increased the level of serum homocysteine to almost 100 nmol/ml.

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