Congenital Femoral Deficiency: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Congenital Femoral Deficiency?
A primary care doctor often makes the first referral. The main specialist is a pediatric orthopedic surgeon, a doctor who performs surgery on children's bones and joints. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What it is
Congenital femoral deficiency is a condition a baby is born with. The femur, the thigh bone between the hip and the knee, is shorter than normal or partly missing. Doctors sometimes call the most common form proximal femoral focal deficiency, meaning the top of the thigh bone near the hip is underdeveloped. It usually affects only one leg.
Symptoms
The main sign is a leg that is shorter than the other. Some children also have a hip that feels loose or moves in an unusual way. The condition does not usually cause pain in babies.
Causes and who gets it
The cause is not fully known. It happens early in pregnancy while the leg bones are forming. Most cases occur in babies with no family history. Some cases are linked to other conditions or to certain medicines taken during pregnancy.
How doctors diagnose it
Doctors often notice the difference in leg length soon after birth during a physical exam. An X-ray confirms the diagnosis and shows how much of the thigh bone is affected.
Treatment
Treatment depends on how short the leg is, how well the hip and knee work, and the child's age. The goal is to help the child walk and move as normally as possible.
A shoe lift can balance out a small difference in leg length. Surgery to lengthen the thigh bone is done in stages over months while a device slowly stretches the bone.
When to see a doctor
Parents should talk to a doctor if a baby has one leg that looks shorter than the other, if a child limps, or if a child has leg pain that does not go away.
How a direct primary care or concierge doctor fits in
A direct primary care doctor is paid a flat monthly fee instead of billing insurance for visits; a concierge doctor charges more and often works alongside insurance. Either type can handle the first exam, order X-rays, and refer the child to a pediatric orthopedic surgeon when needed.
Common questions
Can congenital femoral deficiency be cured?
There is no cure, but treatment can improve how a child walks and moves. Most children with this condition learn to walk and stay active. The exact results depend on how severe the condition is, and they differ from child to child.
Will my child need surgery?
Not always. A small difference in leg length may only need a shoe lift and regular checkups. Larger differences are more likely to need surgery. The surgeon will explain the options based on X-rays and how the hip and knee work.
Does the leg length difference get worse with age?
The difference often becomes more noticeable as a child grows, because the shorter leg may grow more slowly. Doctors measure this over time with X-rays. This is one reason regular follow-up visits matter during childhood.
Can adults have this condition treated?
Adults can sometimes have leg length surgery, but treatment is more complex after the bones stop growing. Many adults manage smaller differences with shoe lifts. An orthopedic surgeon can discuss what is possible for a specific case.
Sources
- MedlinePlus - Birth Defects
- American Academy of Orthopaedic Surgeons - Lower Limb Length Discrepancy - OrthoInfo - AAOS
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
