Overview
GJC2-related late-onset primary lymphedema is a rare inherited condition that affects the lymphatic system — the network of vessels that drains excess fluid from your body's tissues. In this disease, changes (mutations) in the GJC2 gene cause the lymphatic vessels to work poorly, leading to a buildup of fluid in the tissues. This swelling, called lymphedema, most often affects the legs and feet, though it can sometimes involve the arms or other areas. Unlike some forms of lymphedema that appear at birth or in early childhood, this condition typically shows up in the teenage years or in adulthood, which is why it is called 'late-onset.' It is also sometimes referred to as Lymphedema-distichiasis syndrome overlap or GJC2 lymphedema, though it is distinct from other GJC2-related conditions. The main symptom is persistent, painless swelling that usually starts in one or both legs. Over time, the skin in the affected area may become thickened or hardened. There is no cure at this time, but treatment focuses on managing swelling and preventing complications. This includes compression garments, special massage techniques called manual lymphatic drainage, exercise, and careful skin care. With consistent management, many people are able to live active lives, though the condition is lifelong and requires ongoing attention.
Key symptoms:
Swelling (lymphedema) in one or both legs, usually starting at the ankle or footSwelling that may slowly spread upward toward the knee or thighA feeling of heaviness or tightness in the affected legSkin that feels thicker or firmer than normal in the swollen areaRecurring skin infections (cellulitis) in the swollen limbDifficulty fitting into shoes or clothing due to swellingAching or discomfort in the affected limbReduced flexibility or range of motion in the ankle or legSkin changes such as hardening or a warty texture over time if untreated
Clinical phenotype terms (13)— hover any for plain English
Autosomal dominant
Passed on from just one parent; each child has about a 50% chance of inheriting it
Late onset
Begins later in life, typically after age 50
Treatments
No FDA-approved treatments are currently listed for GJC2-related late-onset primary lymphedema.
View clinical trials →Clinical Trials
View all trials with filters →No actively recruiting trials found for GJC2-related late-onset primary lymphedema at this time.
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Specialists
View all specialists →No specialists are currently listed for GJC2-related late-onset primary lymphedema.
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 GJC2-related late-onset primary lymphedema.
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.Is my swelling definitely caused by a GJC2 gene change, and should other family members be tested?,What type of compression garment is right for me, and how often should it be replaced?,How do I find a certified lymphedema therapist in my area?,What are the warning signs of a skin infection, and what should I do if I think I have one?,Are there any clinical trials or new treatments I should know about?,Will my lymphedema get worse over time, and what can I do to slow that down?,Are there any activities or jobs I should avoid to protect my lymphatic system?
Common questions about GJC2-related late-onset primary lymphedema
What is GJC2-related late-onset primary lymphedema?
GJC2-related late-onset primary lymphedema is a rare inherited condition that affects the lymphatic system — the network of vessels that drains excess fluid from your body's tissues. In this disease, changes (mutations) in the GJC2 gene cause the lymphatic vessels to work poorly, leading to a buildup of fluid in the tissues. This swelling, called lymphedema, most often affects the legs and feet, though it can sometimes involve the arms or other areas. Unlike some forms of lymphedema that appear at birth or in early childhood, this condition typically shows up in the teenage years or in adultho
How is GJC2-related late-onset primary lymphedema inherited?
GJC2-related late-onset primary lymphedema follows a autosomal dominant inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does GJC2-related late-onset primary lymphedema typically begin?
Typical onset of GJC2-related late-onset primary lymphedema is late onset. Age of onset can vary across affected individuals.