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Diseases

Genetic and Rare Diseases Information Center (GARD)

Syndactyly type 1


Other Names for this Disease
  • SDTY1
  • SD1
  • Zygodactyly
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.

Your Question

I was born with complete and complex syndactyly of my right hand. I would like to learn more about this and what may have caused this to happen.

Our Answer

We have identified the following information that we hope you find helpful. If you still have questions, please contact us.

What is syndactyly?

Syndactyly is a term used to describe webbed or conjoined fingers. In general, syndactyly is classified as complete (fingers that are joined all the way to the finger tips) or incomplete (fingers that are joined only part way up the fingers). Additionally, syndactyly is classified as simple (fingers that are joined by skin and soft tissue only) or complex (fingers in which underlying bones are also joined together). Some patients may also have a "complicated" syndactyly that involves extra bones and abnormal tendon and/or ligament development.[1]
Last updated: 9/9/2009

What causes syndactyly?

During normal embryonic development, the hand initially forms in the shape of a paddle, and then eventually splits into separate fingers. Syndactyly results when one or more fingers fail to separate during this time. Research continues into further understanding why this happens. Many cases seem to occur without an apparent cause, while some may occur due to a genetic (inherited) defect. Syndactyly may also occur as a part of an underlying hereditary syndrome.[1]

If the cause of your syndactyly is unknown, a genetics professional may be able to assist you.



Last updated: 9/9/2009

How can I find a genetics professional in my area?

To find a medical professional who specializes in genetics, you can ask your doctor for a referral or you can search for one yourself. Online directories are provided by GeneTests, the American College of Medical Genetics, and the National Society of Genetic Counselors. If you need additional help, contact a GARD Information Specialist. You can also learn more about genetic consultations from Genetics Home Reference.
Last updated: 7/15/2016

References
Other Names for this Disease
  • SDTY1
  • SD1
  • Zygodactyly
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.