KidsMD Health Topics

Request an Appointment

If this is a medical emergency, please dial 9-1-1. This form should not be used in an emergency.

Patient Information
Date of Birth:
Contact Information
Appointment Details
Send RequestIf you do not see the specialty you are looking for, please call us at: 617-355-6000.International visitors should call International Health Services at +1-617-355-5209.
Please complete all required fields

This department is currently not accepting appointment requests online. Please call us at: 617-355-6000. International +1-617-355-6000.

This department is currently not accepting appointment requests online. Please call us at: 617-355-6000. International +1-617-355-6000.

Thank you.

Your request has been successfully submitted

You will be contacted within 1 business day.

If you have questions or would like more information, please call:

617-355-6000 +1-617-355-6000
Find a Doctor
Search by Clinician's Last Name or Specialty:
Select by Location:
Search by First Letter of Clinician's Last Name: *ABCDEFGHIJKLMNOPQRSTUVWXYZ
Condition & Treatments
Search for a Condition or Treatment:
View allSearch

Radioulnar synostosis in Children

  • Overview

    Combining training in adult and pediatric orthopedics, hand surgery, plastic surgery and microsurgery allows our surgeons to provide a comprehensive level of care unmatched in most other hospital settings

    Donald S. Bae, MD, associate in Orthopedic Surgery, Boston Children's Hospital

    If your baby was born with radioulnar synostosis, we know that you and your family are concerned. So, please know that at Boston Children’s Hospital, we will approach your child’s treatment and care with sensitivity and support—for your child and your whole family.

    Radioulnar synostosis is usually congenital (something your child was born with); but it may also occur after a forearm fracture or trauma. Please note that these pages discuss the congenital form of the condition.

    • If your child has radioulnar synostosis, it means that she has an abnormal bony or soft tissue connection between the two bones of her forearm—the radius (forearm bone on the (thumb) side) and ulna (forearm bone on the (little finger) side).
    • “Synostosis” means a union or fusion of bones that are usually distinct from each other—in this case, the radius and ulna near the elbow.
    • Signs and symptoms of your child’s condition can range from a minor to a major limitation in his/her ability to rotate his/her arm from a pronated (palms down) position to a supinated (palms up) position. She may also carry her elbow at an abnormal angle or have a shortened forearm.
    • The end of the radius bone closest to the elbow (radial head) may be, or may become, dislocated.
    • Diagnosis is usually confirmed by a physical exam, x-rays and/or CT scans.
    • Children whose forearms lie in functional positions may never need surgery. Children who have the problem in both arms, and/or whose forearms are fixed in a position that limits their ability to use their arm, may benefit from surgery.
    • Children with mild to moderate cases often compensate for their limited arm-rotation by wrist and shoulder motions.
    • Radioulnar synostosis can occur:
      • by itself (in isolation)
      • in association with other skeletal abnormalities (about one-third of the time)
      • in association with problems of the heart, kidneys, nervous system or gastrointestinal system
      • in association with certain genetic syndromes, such as Holt-Oram syndrome (also called hand-heart syndrome) and fetal alcohol syndrome
    • The condition affects both of a child’s arms about 60 percent of the time.
    • The average age at diagnosis is about 6 years old.
    • Boys and girls are equally affected.
    • The condition isn’t usually painful for a baby. But if left untreated or undiagnosed, teens may begin experiencing pain if the end of the radius (radial head) becomes dislocated.

    How Boston Children's Hospital approaches radioulnar synostosis

    You can have peace of mind knowing that the skilled experts in our Orthopedic Center’s Hand and Orthopedic Upper Extremity Program have treated thousands of babies and children with hand problems, ranging from the routine to the highly complex. So we can provide your child with expert diagnosis, treatment and care—as well as the benefits of some of the most advanced clinical and scientific research in the world.

    Our Orthopedic Center is nationally known as the preeminent center for the care of children and young adults with a wide range of developmental, congenital, neuromuscular, sports related, traumatic and post-traumatic problems of the musculoskeletal system.

    Radioulnar synostosis: Reviewed by Donald Bae, MD
    © Boston Children's Hospital, 2011

The future of pediatrics will be forged by thinking differently, breaking paradigms and joining together in a shared vision of tackling the toughest challenges before us.”
- Sandra L. Fenwick, President and CEO