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Arachnodactyly is a condition in which the fingers are long, slender, and curved. They look like a spider's legs.
Dolichostenomelia; Spider fingers; Achromacria
Long, slender fingers can be normal and not associated with any medical problems. In some cases, however, spider fingers can be a sign of an underlying disease.
- Marfan syndrome
- Other rare genetic disorders
Note: Having long, slender fingers may be normal.
When to Contact a Medical Professional
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 Office Visit
The health care provider will perform a physical exam and ask questions about the patient's medical history, including:
- 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?
- What other symptoms are also present?
- Have you noticed any other unusual things?
Diagnostic tests are usually not necessary unless a hereditary disorder is suspected.
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.