Heterozygous MTHFR A1298C Mutation causing Cerebral Venous Sinus Thrombosis

Area of Science:

• Neurology
• Genetics
• Vascular Medicine

Background:

• Cerebral venous sinus thrombosis (CVST) is a rare but serious condition that can lead to seizures and neurological deficits.
• Generalized tonic-clonic seizures are a common presentation of neurological compromise.
• Identifying the underlying cause of CVST is crucial for effective management and prevention of recurrence.

Observation:

• A 21-year-old college student presented with a history of generalized tonic-clonic seizures.
• MR Venography identified left sigmoid and transverse sinus thrombosis.
• Secondary venous hemorrhagic infarcts were observed in the affected areas.

Findings:

• Thorough investigation revealed a heterozygous methylenetetrahydrofolate reductase (MTHFR) A1298C mutation in the patient.
• This specific MTHFR gene variant was identified as the causative factor for the cerebral venous sinus thrombosis.
• The mutation likely impairs folate metabolism, contributing to a prothrombotic state.

Implications:

• This case underscores the importance of genetic screening, specifically for MTHFR mutations, in young individuals presenting with unexplained cerebral venous sinus thrombosis.
• Early diagnosis of MTHFR A1298C mutation can guide personalized treatment strategies, including anticoagulation and potentially folate supplementation.
• Understanding the genetic underpinnings of CVST can improve patient outcomes and inform future research into thrombophilia.