Congenital Limb Defects

A congenital limb difference is a difference in how a child's arm, hand, leg or foot develops before birth. A child may be born with part of a limb that is smaller or missing, or with differences in the shape, number or movement of their fingers, toes, hands or feet.

Congenital limb differences vary widely. Some have little effect on a child's movement or daily activities, while others can affect strength, balance, mobility or the way a child uses an arm or leg.

At UVA Health Children's, we have extensive experience helping children with limb differences excel.

Types of Congenital Limb Differences

Congenital limb differences can affect any part of an arm or leg. Examples include:

• Limb deficiency: Part or all of an arm or leg does not fully develop.
• Short or underdeveloped limbs: An arm or leg, or part of it, is smaller than expected.
• Differences of the fingers or toes: A child may have extra or missing fingers or toes, or fingers or toes that are joined together.
• Differences in the shape or formation of the bones: Bones may be missing, shortened or formed differently.
• Differences in joint development: A joint may not form normally or may have limited movement.

Some children have an isolated limb difference, while others have a limb difference as part of a genetic syndrome or another medical condition.

Causes of Congenital Limb Differences

In many cases, the exact cause of a congenital limb difference is not known.

Limb development is a complex process that takes place early in pregnancy. Genetic changes, certain medical conditions and some exposures during pregnancy can affect this development. In some children, a congenital limb difference is associated with a genetic condition or syndrome.

Importantly, parents should not assume that something they did during pregnancy caused their child's limb difference. In many cases, there is no identifiable cause.

Diagnosing Congenital Limb Differences

Some limb differences are identified during a prenatal ultrasound, while others are first noticed after birth.

If a limb difference is identified before birth, additional imaging may be recommended to better understand how the limb has developed and to look for other conditions. Depending on the findings, your care team may recommend genetic counseling or testing.

After birth, your child's evaluation may include:

• A physical and neurological examination
• X-rays or other imaging to evaluate bones and joints
• Ultrasound or MRI when additional information is needed
• Assessment of movement, strength and sensation
• Genetic testing when a genetic condition is suspected
• Evaluation for other medical conditions when appropriate

Understanding exactly how the limb developed helps your child's care team determine what treatment, if any, will be most helpful.

Treatment for Congenital Limb Differences

Treatment depends on the type of limb difference and how it affects your child's movement and daily life. Some children need little or no treatment. Others benefit from a combination of surgery, therapy, orthotics or prosthetic devices.

Treatment may include:

Prosthetic & Orthotic Devices

Prosthetic limbs or specialized devices can help some children improve mobility or use of an affected limb. Orthotics, braces and other adaptive devices may also provide support, improve positioning or make everyday activities easier.

Surgery

Some children may benefit from surgery to improve limb function, correct a difference in bone or joint development, separate joined fingers or toes, or prepare a limb for a prosthetic device.

Surgery is not necessary for every child. The decision depends on your child's anatomy, function, age and goals.

Physical & Occupational Therapy

Physical therapy can help children develop strength, balance, coordination and mobility. Occupational therapy can help children learn ways to use their hands and arms, perform daily activities and adapt to differences in movement or function.

Therapy and adaptive equipment can help children participate in activities at home, school and play.

Growing Up With a Congenital Limb Difference

Children with congenital limb differences often continue to develop new skills and abilities as they grow. Treatment plans may change with growth, particularly as a child becomes more active or reaches new developmental stages.

Ongoing care may include monitoring:

• Bone and joint development
• Strength and range of motion
• Walking and other mobility skills
• Hand and arm function
• Prosthetic or orthotic needs
• Participation in school, sports and other activities
• Pain or problems caused by changes in the musculoskeletal system

The goal of treatment is not simply to change how a limb looks. It is to help each child move, function and participate as independently as possible.