Isolated tibio-fibular synostosis

Isolated tibio-fibular synostosis is a rare bone condition in which the two bones of the lower leg — the tibia (shinbone) and the fibula (the thinner bone next to it) — are abnormally fused or joined together. This fusion can occur at the upper (proximal) end near the knee, or less commonly at the lower (distal) end near the ankle, or along the shaft of the bones. The condition is present from birth, though it may not be noticed until later in childhood or even adulthood, depending on the severity and location of the fusion. People with this condition may experience limited movement at the ankle or knee, leg pain, difficulty walking or running, and sometimes a noticeable difference in leg shape or length. In mild cases, the fusion may cause few or no symptoms and may be discovered incidentally on an X-ray taken for another reason. In more significant cases, the abnormal connection between the two bones can restrict normal motion and lead to discomfort during physical activity. Treatment depends on the severity of symptoms. Many mild cases require no treatment at all, while more symptomatic cases may benefit from physical therapy, pain management, or in some situations, surgical intervention to improve function. The condition is sometimes called tibiofibular synostosis and is classified under congenital limb anomalies. It is considered 'isolated' when it occurs on its own, without other skeletal or organ abnormalities.

Bring these to your next appointment

• Q1.Where exactly is the fusion located in my child's leg, and how much does it affect movement?,Will this condition get worse as my child grows?,Is physical therapy recommended, and how often should sessions occur?,At what point would surgery be considered, and what are the risks and benefits?,Should we have genetic testing to check for any related conditions?,Are there any activities or sports my child should avoid?,How often should we schedule follow-up imaging or appointments?

Common questions about Isolated tibio-fibular synostosis

Related conditions

Other rare diseases commonly researched alongside Isolated tibio-fibular synostosis.

• Multiple synostoses syndrome→