Amputation and the Active Life with Prosthetics

Choosing amputation is often a decision made to simplify a child’s medical journey and provide them with immediate, reliable mobility. For children with severe Fibular Hemimelia (FH), early amputation followed by prosthetic use is a well-established path that leads to highly active, athletic, and normal lives ^[1][2].

The Surgery: Syme vs. Boyd

The primary goal of surgery for FH is to create a strong, stable stump that can handle the pressure of walking. Surgeons typically use one of two specialized techniques, both of which are disarticulations (separating the foot at the joint rather than cutting through the long bone):

• Syme Amputation: The foot bones are removed at the ankle joint, but the tough skin and fat of the heel—the heel pad—are preserved and repositioned directly over the end of the shin bone ^[3][4].
• Boyd Amputation: A slightly different approach where a portion of the heel bone (calcaneus) is preserved and fused to the shin bone (tibia). This fusion helps lock the heel pad firmly in place and provides a slightly longer limb ^[5][2].

Why the heel pad matters: In both surgeries, keeping the heel pad is vital. It acts as a natural shock absorber, allowing your child to bear weight directly on the end of their limb ^[3]. This means they can walk around the house at night or stand in the shower without needing to put on their prosthesis ^[3].

Preventing Complications: Surgeons specifically choose the Syme or Boyd procedures for children because they preserve the growth plate at the end of the tibia. Standard “below-knee” amputations that cut through the bone frequently lead to a painful complication called terminal overgrowth, where the cut bone grows faster than the surrounding skin ^[6][7]. By using the Syme or Boyd disarticulation techniques, surgeons largely eliminate the risk of terminal overgrowth ^[3].

Timing and Walking

The ideal time for this surgery is typically around 12 months of age ^[2]. Performing the surgery just as a child is beginning to pull to stand or “cruise” around furniture allows them to incorporate the prosthesis seamlessly into their natural developmental milestones. Most children are fitted for their first prosthesis within a few weeks of surgery and begin walking on their “new leg” shortly after ^[2].

Growing with a Prosthesis

Because your child is growing, their prosthetic needs will change frequently.

• The Fitting Process: A prosthetist (a specialist who makes artificial limbs) will take a cast or a digital scan of your child’s limb to create a custom-fitted socket.
• New Legs: On average, a growing child needs a new prosthesis every 12 to 18 months ^[8]. Just as you have to buy new shoes as their feet grow, you will need “growth” adjustments to their leg.

Life and Sports

Children with Syme or Boyd amputations are not limited by their prosthesis. They participate in sports, dance, and playground activities right alongside their peers ^[1][9]. Modern prosthetics are designed for high impact, and specialized “running blades” or sport-specific feet can be introduced as your child gets older and more competitive ^[10][11]. Overall, the goal of this path is to allow the child to focus on being a kid, rather than on being a patient.