Overview
X-linked myopathy with excessive autophagy (XMEA) is a rare inherited muscle disease that affects mainly males. It is sometimes called X-linked vacuolar myopathy. The disease is caused by changes in a gene on the X chromosome, which means it is passed down through families in an X-linked pattern. In XMEA, muscle cells build up too much of a process called autophagy — the body's normal way of cleaning out damaged cell parts. When this process goes into overdrive, it damages muscle fibers instead of helping them. Over time, this leads to progressive muscle weakness, mainly in the legs and lower body. The main symptoms include slowly worsening weakness in the muscles closest to the body, such as the thighs and hips, making it harder to walk, climb stairs, or get up from a chair. Most people are diagnosed in childhood or early adulthood, though symptoms can start at different ages. The heart and breathing muscles are generally not severely affected, which is different from some other muscle diseases. There is currently no cure for XMEA. Treatment focuses on managing symptoms, maintaining mobility through physical therapy, and monitoring for complications. Because the disease is so rare, research is ongoing, and patients are encouraged to connect with specialists in neuromuscular diseases and rare genetic conditions.
Also known as:
Key symptoms:
Progressive weakness in the thigh and hip musclesDifficulty walking or climbing stairsTrouble getting up from a seated or lying positionMuscle wasting (loss of muscle bulk) in the legsMild weakness in the shoulder and upper arm musclesAbnormal gait or waddling walkFatigue with physical activityReduced exercise tolerancePossible mild elevation of muscle enzymes in blood tests
X-linked recessive
Carried on the X chromosome; typically affects males more than females
Childhood
Begins in childhood, roughly ages 1 to 12
Treatments
No FDA-approved treatments are currently listed for X-linked myopathy with excessive autophagy.
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Specialists
View all specialists →No specialists are currently listed for X-linked myopathy with excessive autophagy.
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 X-linked myopathy with excessive autophagy.
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 genetic testing do you recommend to confirm the diagnosis, and should other family members be tested?,How quickly do you expect the muscle weakness to progress in my case?,What type of physical therapy program is best for someone with XMEA?,Are there any clinical trials or research studies I should consider joining?,Should I have my heart and breathing function monitored regularly?,What assistive devices or home modifications might I need in the future?,Are there any activities I should avoid to protect my muscles?
Common questions about X-linked myopathy with excessive autophagy
What is X-linked myopathy with excessive autophagy?
X-linked myopathy with excessive autophagy (XMEA) is a rare inherited muscle disease that affects mainly males. It is sometimes called X-linked vacuolar myopathy. The disease is caused by changes in a gene on the X chromosome, which means it is passed down through families in an X-linked pattern. In XMEA, muscle cells build up too much of a process called autophagy — the body's normal way of cleaning out damaged cell parts. When this process goes into overdrive, it damages muscle fibers instead of helping them. Over time, this leads to progressive muscle weakness, mainly in the legs and lower
How is X-linked myopathy with excessive autophagy inherited?
X-linked myopathy with excessive autophagy follows a x-linked recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does X-linked myopathy with excessive autophagy typically begin?
Typical onset of X-linked myopathy with excessive autophagy is childhood. Age of onset can vary across affected individuals.