Overview
Rare diabetes mellitus type 2 (also sometimes referred to as rare forms of type 2 diabetes or monogenic forms mimicking type 2 diabetes) is an uncommon form of diabetes that shares features with the more common type 2 diabetes but has distinct genetic causes. Unlike typical type 2 diabetes, which is driven largely by lifestyle factors and complex genetics, rare diabetes mellitus type 2 involves specific genetic changes that affect how the body produces or uses insulin. Insulin is a hormone that helps your cells take in sugar from the blood for energy. When this process does not work properly, blood sugar levels rise, which over time can damage blood vessels, nerves, kidneys, eyes, and the heart. Symptoms can include increased thirst, frequent urination, unexplained weight changes, fatigue, blurred vision, and slow wound healing. Some patients may also develop skin darkening in body folds (called acanthosis nigricans) or experience tingling and numbness in the hands and feet. Because this is a rare form, it may not respond to standard type 2 diabetes treatments in the expected way, and patients may need specialized care. The treatment landscape includes blood sugar monitoring, dietary management, oral diabetes medications such as metformin, and sometimes insulin therapy. Because the underlying genetic cause can vary, treatment may need to be tailored to the specific genetic defect. Ongoing research is helping to identify more precise therapies for these rare subtypes. Early diagnosis and proper management are important to prevent long-term complications such as kidney disease, vision loss, and cardiovascular problems.
Also known as:
Key symptoms:
Increased thirstFrequent urinationUnexplained fatigue or tirednessBlurred visionSlow healing of cuts and woundsUnexplained weight loss or weight gainTingling or numbness in hands or feetDarkened skin patches in body foldsFrequent infectionsHunger even after eatingDry mouthDifficulty concentrating
Variable
Can be inherited in different ways depending on the underlying gene
Variable
Can begin at different ages, from infancy through adulthood
FDA & Trial Timeline
2 eventsMcGill University Health Centre/Research Institute of the McGill University Health Centre
Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.
Treatments
No FDA-approved treatments are currently listed for Rare diabetes mellitus type 2.
2 clinical trialsare actively recruiting — trials can provide access to cutting-edge therapies.
View clinical trials →Rare Disease Specialist
Treatment Centers
8 centersUniversity of Pennsylvania
📍 Philadelphia, Pennsylvania
Stanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🔬 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
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🏥 NORDBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
Travel Grants
No travel grants are currently matched to Rare diabetes mellitus type 2.
Community
No community posts yet. Be the first to share your experience with Rare diabetes mellitus type 2.
Start the conversation →Latest news about Rare diabetes mellitus type 2
1 articlesCaregiver 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.Could my diabetes have a specific genetic cause, and should I have genetic testing?,Is my current treatment the best option for my specific type of diabetes?,How often should I monitor my blood sugar, and what are my target levels?,What complications should I watch for, and how often do I need screening tests?,Should my family members be tested for this condition?,Are there any clinical trials or new treatments that might be appropriate for me?,What should I do if my blood sugar drops very low or goes very high?
Common questions about Rare diabetes mellitus type 2
What is Rare diabetes mellitus type 2?
Rare diabetes mellitus type 2 (also sometimes referred to as rare forms of type 2 diabetes or monogenic forms mimicking type 2 diabetes) is an uncommon form of diabetes that shares features with the more common type 2 diabetes but has distinct genetic causes. Unlike typical type 2 diabetes, which is driven largely by lifestyle factors and complex genetics, rare diabetes mellitus type 2 involves specific genetic changes that affect how the body produces or uses insulin. Insulin is a hormone that helps your cells take in sugar from the blood for energy. When this process does not work properly,
Are there clinical trials for Rare diabetes mellitus type 2?
Yes — 2 recruiting clinical trials are currently listed for Rare diabetes mellitus type 2 on UniteRare. See the clinical trials section on this page for phase, sponsor, and site details sourced from ClinicalTrials.gov.
Which specialists treat Rare diabetes mellitus type 2?
3 specialists and care centers treating Rare diabetes mellitus type 2 are listed on UniteRare, sourced from ClinicalTrials.gov principal investigators, published research, and the NPPES NPI registry.