Arachnodactyly is a condition in which the fingers are long, slender, and curved. They look like the legs of a spider (arachnid).
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 disorder.
Causes may include:
Note: Having long, slender fingers may be normal.
Some children are born with arachnodactyly. It may become more evident over time. Talk to your health care provider if your child has long, slender fingers and you are concerned that an underlying condition may exist.
The provider will perform a physical exam. You will be asked questions about the medical history. This includes:
Diagnostic tests are most often not necessary unless a hereditary disorder is suspected.
Reviewed By: Kimberly G. Lee, MD, MSc, IBCLC, Clinical Professor of Pediatrics, Division of Neonatology, Medical University of South Carolina, Charleston, SC. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.