Specific white matter lesions visible on brain scans may indicate hidden folate deficiency in people with MTHFR genetic variations, according to a 2026 case report. An 18-year-old woman with dizziness and balance problems was found to have low folate levels and a genetic variation affecting folate metabolism. Gram Research analysis suggests recognizing this brain imaging pattern could enable early diagnosis and prevent serious neurological complications.
Doctors discovered that specific patterns on brain scans can signal a hidden folate deficiency linked to a genetic variation. An 18-year-old woman came to the hospital with dizziness and balance problems. Brain imaging showed unusual white matter lesions, which are areas of damage in the brain’s communication pathways. Further testing revealed she had low folate levels and carried a genetic variation in the MTHFR gene that affects how her body processes this essential B vitamin. According to Gram Research analysis, recognizing these specific brain scan patterns could help doctors catch folate deficiency early, before serious neurological problems develop.
Key Statistics
A 2026 case report documented an 18-year-old woman with bilateral periventricular white matter lesions on brain MRI who was subsequently found to have low serum folate levels and compound heterozygous MTHFR gene variations.
The patient’s father was also found to carry the same MTHFR gene compound heterozygous genotype, suggesting the genetic variation runs in families and may predispose multiple family members to folate-related brain changes.
The specific pattern of white matter lesions adjacent to the posterior horns of the lateral ventricles appeared in a patient with folate deficiency and MTHFR genetic variations, suggesting this imaging pattern may serve as an early radiological marker for the condition.
The Quick Take
- What they studied: Whether specific brain scan findings could be an early warning sign of folate deficiency in people with a particular genetic variation
- Who participated: One 18-year-old woman who came to the hospital with dizziness and balance problems, plus her father who was later found to have the same genetic variation
- Key finding: Brain scans showed white matter lesions (damaged areas in the brain’s communication pathways) that turned out to be linked to low folate levels and a genetic variation in the MTHFR gene
- What it means for you: If you have unexplained dizziness, balance problems, or tingling in your hands and feet, doctors should check your folate levels and consider genetic testing. This is especially important if family members have similar symptoms or genetic variations
The Research Details
This is a case report, which means doctors documented the medical story of one patient in detail. The 18-year-old woman came to the hospital complaining of persistent dizziness that had lasted one month. Doctors performed a brain MRI scan, which is a detailed imaging test that shows the structure of the brain. The scan revealed unusual white matter lesions, which are areas where the brain’s communication pathways appear damaged or abnormal. These lesions were located in a specific area called the periventricular region, near the back of the brain’s fluid-filled chambers.
When the patient developed additional symptoms like tingling in her hands and feet, doctors admitted her for more testing. They performed a neurological examination, which checks how well the nervous system is working. They also analyzed cerebrospinal fluid, the clear liquid that surrounds the brain and spinal cord. Interestingly, the initial diagnosis was thought to be an autoimmune disorder affecting the brainstem and cerebellum, so the patient received high-dose intravenous corticosteroids, which are powerful anti-inflammatory medications.
During follow-up investigation, doctors discovered that the brain lesions might be related to something else entirely. Blood tests showed the patient had low serum folate levels, which means she wasn’t getting enough of this essential B vitamin. Genetic testing revealed she carried a compound heterozygous genotype of the MTHFR gene, meaning she inherited two different genetic variations that affect how her body processes folate. Her father was later found to have the same genetic variation.
This case matters because it shows that brain imaging patterns can sometimes reveal hidden nutritional and genetic problems that doctors might otherwise miss. The specific location of the white matter lesions, combined with genetic testing, helped identify a treatable condition. Early recognition of these patterns could prevent serious neurological complications in other patients with similar genetic variations.
This is a single case report, which is the lowest level of scientific evidence. It describes one patient’s experience in detail but cannot prove that this pattern applies to all people with folate deficiency and MTHFR variations. The case is valuable because it suggests a new diagnostic pattern that future research should investigate. The patient’s father also having the same genetic variation adds some support to the genetic component of the findings.
What the Results Show
The patient’s brain MRI revealed bilateral periventricular white matter lesions, which means there were abnormal areas on both sides of the brain located near the fluid-filled chambers. These lesions were positioned adjacent to the posterior horns of the lateral ventricles, a very specific anatomical location. Initially, doctors thought these lesions were unrelated to the patient’s main symptoms of dizziness and balance problems.
When doctors investigated these brain lesions further, they discovered the patient had low serum folate levels. Genetic testing showed she carried a compound heterozygous MTHFR genotype, meaning she inherited two different genetic variations that affect how her body processes folate. The MTHFR gene produces an enzyme that helps convert folate into a form her body can use. With two different genetic variations, her body may not process folate efficiently.
After vitamin supplementation was started to increase her folate levels, the patient’s condition improved. The case suggests that the specific pattern of white matter lesions seen on brain scans may be an early warning sign of folate deficiency in people with this genetic variation, even before they develop obvious folate-deficiency symptoms like anemia or severe neurological problems.
The patient’s father was found to have the same MTHFR gene compound heterozygous genotype, suggesting this genetic variation runs in families. This family connection supports the idea that genetic factors play an important role in who develops these brain lesions. The patient initially improved with corticosteroid treatment for what was thought to be an autoimmune disorder, but the underlying folate deficiency also needed to be addressed. The combination of neurological symptoms, specific brain imaging findings, and genetic testing together pointed to the folate deficiency diagnosis.
Previous research has shown that folate deficiency can cause neurological problems and white matter changes in the brain. However, this case adds new information by identifying a specific brain imaging pattern associated with folate deficiency in people with MTHFR genetic variations. The case suggests that doctors should look for this particular pattern of white matter lesions as a potential clue to folate deficiency, even when other diagnoses seem more likely. This represents a new way of thinking about what certain brain scan findings might mean.
This is a single case report involving one patient, so the findings cannot be generalized to all people with folate deficiency or MTHFR variations. We don’t know how common this brain imaging pattern is in people with this genetic variation. The patient received corticosteroid treatment, which may have affected her symptoms and recovery. We don’t have long-term follow-up information about whether the brain lesions resolved completely with folate supplementation. Future research with larger groups of patients would be needed to confirm whether this imaging pattern is truly a reliable early warning sign.
The Bottom Line
If you experience unexplained dizziness, balance problems, or tingling sensations in your hands and feet, ask your doctor to check your folate levels and consider genetic testing for MTHFR variations, especially if family members have similar symptoms. If you are found to have low folate levels, vitamin B supplementation may help prevent neurological complications. This recommendation is based on a single case report, so discuss with your doctor whether it applies to your situation.
People with unexplained neurological symptoms like dizziness, balance problems, or tingling sensations should pay attention to this case. Family members of people diagnosed with folate deficiency and MTHFR variations should consider genetic testing. Healthcare providers should be aware of this imaging pattern as a potential clue to folate deficiency. People with known MTHFR genetic variations may benefit from regular folate level monitoring.
In this case, the patient showed improvement in her balance and eye movement problems within days to weeks of starting corticosteroid treatment. The timeline for improvement from folate supplementation alone is not clearly described in this case report. It typically takes several weeks to months for folate levels to normalize and for neurological symptoms to improve with supplementation. Long-term monitoring would be needed to determine if the brain lesions resolve completely.
Frequently Asked Questions
What is MTHFR and why does it matter for folate deficiency?
MTHFR is a gene that produces an enzyme helping your body convert folate into a usable form. Genetic variations in MTHFR can reduce this enzyme’s efficiency, making it harder for your body to process folate properly, potentially leading to deficiency even with adequate intake.
Can folate deficiency cause brain damage visible on MRI scans?
Yes, folate deficiency can cause white matter lesions, which are areas of damage in the brain’s communication pathways visible on MRI scans. A 2026 case report showed specific lesion patterns in a patient with low folate and MTHFR variations, suggesting these imaging findings may indicate hidden folate deficiency.
What are the early symptoms of folate deficiency I should watch for?
Early symptoms include persistent dizziness, tingling or numbness in hands and feet, balance problems, and abnormal eye movements. Some people may not notice obvious symptoms before brain changes appear on imaging, which is why genetic testing matters for at-risk individuals.
If my parent has MTHFR variations, should I get tested?
Yes, MTHFR variations run in families. If a parent has compound heterozygous MTHFR genotype, you have a significant chance of inheriting similar variations. Testing can identify whether you carry these variations and whether you need folate monitoring or supplementation.
How long does it take for folate supplementation to improve neurological symptoms?
Improvement timelines vary, but neurological symptoms typically begin improving within weeks to months of starting folate supplementation. The 2026 case report showed symptom improvement but did not specify the exact timeline for folate-related recovery specifically.
Want to Apply This Research?
- Track your folate intake through food sources like leafy greens, legumes, and fortified grains. Log any neurological symptoms such as dizziness, tingling, or balance changes weekly. If you have MTHFR genetic variations, record your folate supplement dosage and any changes in symptoms.
- If you have MTHFR genetic variations or low folate levels, increase dietary folate intake by adding more spinach, kale, lentils, chickpeas, and fortified cereals to your meals. Take folate supplements as prescribed by your doctor. Keep a symptom diary to track whether neurological symptoms improve over time.
- Schedule regular blood tests to monitor folate levels every 3 to 6 months if you have MTHFR variations or a history of folate deficiency. Track neurological symptoms monthly using the app’s symptom log. If you develop new symptoms like dizziness or tingling, report them to your healthcare provider promptly and note them in the app.
This case report describes one patient’s experience and should not be considered medical advice. If you experience dizziness, balance problems, tingling sensations, or other neurological symptoms, consult a healthcare provider for proper evaluation and testing. Genetic testing and folate level assessment should only be performed under medical supervision. Do not start or stop any supplements without discussing with your doctor first. This information is educational and does not replace professional medical diagnosis or treatment.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.