Overview
MEND syndrome stands for Male Epilepsy Neurodegeneration Dysmorphism syndrome. It is an extremely rare genetic condition that primarily affects males and involves a combination of seizures (epilepsy), progressive loss of brain function (neurodegeneration), and unusual facial or body features (dysmorphism). The condition is caused by changes in a gene located on the X chromosome, which is why it mainly affects boys and men. Children with MEND syndrome typically show signs early in life, including seizures that can be difficult to control, developmental delays, and intellectual disability. Over time, brain function may decline, leading to loss of previously acquired skills. Physical features may include distinctive facial characteristics, though these can vary from person to person. There is currently no cure for MEND syndrome. Treatment focuses on managing symptoms, particularly controlling seizures with anti-epileptic medications, and providing supportive therapies such as physical therapy, occupational therapy, and speech therapy. Because the condition is so rare, much of the medical understanding comes from a small number of reported cases, and research is still ongoing to better understand the disease and develop more effective treatments.
Also known as:
Key symptoms:
Seizures that are hard to controlDevelopmental delayIntellectual disabilityLoss of previously learned skillsUnusual facial featuresLow muscle toneMovement problemsDifficulty with speech and languageFeeding difficultiesPoor growthBrain abnormalities seen on imagingBehavioral challenges
Clinical phenotype terms (45)— hover any for plain English
X-linked recessive
Carried on the X chromosome; typically affects males more than females
Infantile
Begins in infancy, roughly 1 month to 2 years old
Treatments
No FDA-approved treatments are currently listed for MEND syndrome.
View clinical trials →Clinical Trials
View all trials with filters →No actively recruiting trials found for MEND syndrome at this time.
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Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to MEND syndrome.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What type of seizures does my child have, and what is the best medication plan?,Are there any clinical trials or experimental treatments available for MEND syndrome?,What therapies (physical, occupational, speech) should we start, and how often?,What should I do if my child has a prolonged seizure at home?,How will this condition likely progress over time in my child's case?,Should other family members be tested for carrier status?,What support services and educational programs are available for my child?
Common questions about MEND syndrome
What is MEND syndrome?
MEND syndrome stands for Male Epilepsy Neurodegeneration Dysmorphism syndrome. It is an extremely rare genetic condition that primarily affects males and involves a combination of seizures (epilepsy), progressive loss of brain function (neurodegeneration), and unusual facial or body features (dysmorphism). The condition is caused by changes in a gene located on the X chromosome, which is why it mainly affects boys and men. Children with MEND syndrome typically show signs early in life, including seizures that can be difficult to control, developmental delays, and intellectual disability. Over
How is MEND syndrome inherited?
MEND syndrome follows a x-linked recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does MEND syndrome typically begin?
Typical onset of MEND syndrome is infantile. Age of onset can vary across affected individuals.
Which specialists treat MEND syndrome?
9 specialists and care centers treating MEND syndrome are listed on UniteRare, sourced from ClinicalTrials.gov principal investigators, published research, and the NPPES NPI registry.