Tibiofibular synostosis- Not necessarily a deficiency,

Source

Tibiofibular synostosis is a condition where the tibia and fibula bones fuse. It is not necessarily a deficiency, but rather a bony bridge that can occur due to various reasons. It can be classified into three categories based on their causes:
‎1. Congenital
‎2. Idiopathic (primary)
‎3. Acquired (secondary)

Congenital as ro do with embryonic origin and the symptoms can be abnormal gait pattern, limited ankle movements, pain and discomfort especially during activities.
Idiopathic have no known cause.

Acquired is inherited genetically - either fro your mun or dad.
‎
‎Tibiofibular synostosis can occur either proximally, which is the part towards the knee, or distally towards the ankle. Above is an image of Osteochondroma, also called cartilaginous exostosis or osteocartilaginous exostosis, a common benign bone tumor in a 21-year-old patient.
‎
‎There is such a case with a sportsperson (x-ray above), and a successful surgery was performed using a bone resection technique, allowing him to continue his sports activities. Conservative methods might have failed, but hope is not lost (Pisecky et al., 2021).
‎

‎Materials used
‎
‎Pisecky, L., Großbötzl, G., Stevoska, S., Stadler, C., Ziernhöld, M., Noack, P., Gotterbarm, T., & Luger, M. (2021). Bilateral proximal tibiofibular synostosis caused by osteochondroma in a 21-year-old highly active male-first in literature. Medicina (Kaunas, Lithuania), 57(10), 1126. https://doi.org/10.3390/medicina57101126
‎
‎