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Genetic and Rare Diseases Information Center (GARD)

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Split hand split foot nystagmus

Other Names for this Disease
  • Karsch-Neugebauer syndrome
  • KNS
  • Split hand nystagmus syndrome
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Your Question

Do children with Karsch-Neugebauer syndrome have other medical or cognitive issues?

Our Answer

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

What are the symptoms of split hand split foot nystagmus?

People with this condition are born with split hands and feet. Split hands and split foot refers to a developmental malformation consisting of missing digits (fingers and/or toes), a deep median cleft (cleft down the center of the hand or foot), and fusion of remaining digits.[1] People with this syndrome also have rapid involuntary movements of the eyes, called nystagmus.[2] Abnormalities of the teeth can occur rarely.[3]
Last updated: 10/17/2013

Do children with split hand split foot nystagmus have other medical or cognitive issues?

There have been very few reported cases of split hand split foot nystagmus to date, however mental and motor development seems to be normal.[4] Although not widely documented, this syndrome may be associated with orodental anomalies such as missing teeth, delayed tooth eruption, and abnormal size and shape of the teeth.[5] We are not aware of other common medical concerns.
Last updated: 10/17/2013

What is the prognosis for split hand split foot nystagmus?

In general, the prognosis of children with split hand split foot nystagmus seems to be favorable.[4] The degree of disability caused by the loss of function in the limbs and by the eye problems, is largely determined by the degree of severity of these defects.[4]
Last updated: 11/1/2013