Houston Methodist. Leading Medicine

Ankle FAQ

Question:

Our 13-year old son had a serious leg injury while at soccer camp. The X-ray showed a piece of bone between the two bones in the lower leg. The doctor said this wasn't normal. What could cause something like this to grow in a child?

Answer:

The bridge of bone between the tibia and fibular bones of the lower leg seen on X-ray is called a synostosis. It is usually a sign of trauma causing an overgrowth of bone. Sometimes a synostosis forms in the ankle after an ankle ligament is torn from a severe sprain.

In children, a synostosis can be congenital, meaning your child was born with it. This does not mean it is genetic or inherited. Congenital synostosis occurs if there's been trauma or infection while the child is in the mother's womb. The synostosis forms during the healing process.

In adults, synostoses can occur after bone graft in the lower leg or if absorbable rods are used for ankle fractures. Any kind of growth delay or abnormality in child or adult can result in synostosis between the two lower leg bones.

It may not be possible to tell if your child was born with this feature, or if a former soccer injury could have led to its formation. Synostoses do grow in size as a result of repeated, tiny fractures occurring called microfractures.

Your son may need to take some time off from sports to allow the healing process to complete itself before further fracture(s) occur. Bryan Hanypsiak, MD, et al. Recurrent Compartment Syndrome After Fracture of a Tibiofibular Synostosis in a National Football League Player. In American Journal of Sports Medicine. Vol. 35. No. 1. Pp. 127-130.

*Disclaimer:* The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.
All content provided by eORTHOPOD® is a registered trademark of Medical Multimedia Group, L.L.C.. Content is the sole property of Medical Multimedia Group, LLC and used herein by permission.

Our Specialties

Where Does It Hurt?

Our Locations

  Follow Us

Follow us on Facebook Follow us on YouTube
Follow us on Twitter