Genetic Sequence Analysis of KCNJ11 Gene (Full Mutation Detection)
This test examines the full sequence of the KCNJ11 gene, which plays a key role in regulating blood sugar and heart function. It helps identify any inherited mutations that may increase your risk for conditions like congenital diabetes or sudden infant death syndrome.
["This genetic test can help diagnose or assess risk for rare but serious conditions linked to KCNJ11 mutations."]
Key facts at a glance
- LOINC
- 75400-2
- Short code
- KCNJ11 Full Mut Anl Bld/T Seq
- Synonyms
- KCNJ11 Full Mut Anl Bld/T Seq
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- sequencing
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you or your child have symptoms of a condition caused by KCNJ11 mutations, such as severe newborn diabetes (hyperglycemia), heart rhythm problems, or unexplained infant deaths. It may also be used in genetic counseling for families with a history of these conditions.
What to Expect Before the Test
No special preparation is needed. A blood sample will be taken from a vein in your arm. If testing is done on a newborn, it may be collected from a heel prick. Results are typically available within 1–2 weeks.
What the Results Mean
Results will show whether you have any known mutations in the KCNJ11 gene. If mutations are found, they may explain your symptoms or risk factors. If no mutations are detected, it does not rule out other genetic or environmental causes.
Common Conditions Linked to KCNJ11 Mutations
Mutations in this gene are strongly linked to **congenital hyperinsulinism** (a rare diabetes condition in infants) and **long QT syndrome** (a heart rhythm disorder). Some mutations may also increase risk for sudden infant death syndrome.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: How Results Impact Care
Short name
KCNJ11 Gene Mutation Test
Frequently asked questions
Could my results affect my child’s future medical care?
Will this test show all possible mutations?
What if my test results are negative but I still have symptoms?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy