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Arachnodactyly

Definition:
Arachnodactyly is a physical condition in which the fingers are long, slender, and curved, resembling a spider's legs.

Alternative Names:
Dolichostenomelia; Spider fingers; Achromacria

Considerations:

Long, slender fingers can be a normal variation, not associated with any medical problems. However, in some cases, the tendency to develop spider fingers can indicate an underlying hereditary disorder.



Common Causes:


Call your health care provider if:

Some children are born with arachnodactyly, although it may develop over time. Consult with your health care provider during a routine examination if your child has long, slender fingers and you are concerned that an underlying condition may exist.



What to expect at your health care provider's office:

The medical history will be obtained and a physical examination performed.

Medical history questions documenting arachnodactyly in detail may include:

  • time pattern
    • When did you first notice the fingers being shaped like this?
  • family history
    • Is there any family history of early death?
    • Is there any family history of known hereditary disorders?
  • other

The physical examination may include thorough inspection for other indications that a hereditary disorder may be present. Diagnostic tests are usually not necessary unless a hereditary disorder is suspected.




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