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Alternative NamesSyndactyly; Polysyndactyly
Definition Return to top
Webbing of the fingers and toes is called syndactyly. It refers to the connection of two or more fingers or toes. Webbing usually only involves a skin connection between the two areas, but in rare cases may involve the connection (fusion) of bones.
Considerations Return to top
Syndactyly may be discovered during an examination of an infant or child. In its most common form, it is seen as webbing between the second and third toes. This form is often inherited and is not unusual. Syndactyly can also occur along with other birth defects involving the skull, face, and bones.
The web connections usually run up to the first joint of the finger or toe, but may run the entire length.
"Polysyndactyly" describes both webbing and the presence of an extra number of fingers or toes.
Causes Return to top
Relatively common causes:
Extremely rare causes:
When to Contact a Medical Professional Return to top
This condition is normally discovered at birth and evaluated during the newborn hospital stay.
What to Expect at Your Office Visit Return to top
The health care provider will perform a physical exam and ask questions about the child's medical history. Questions may include:
An infant with webbing may have other symptoms and signs that, when taken together, define a specific syndrome or condition. Diagnosis of that condition is based on a family history, medical history, and a physical exam.
The following tests may be done: