You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is An 8 year old boy with a history of fall from 10 feet height complains of pain in the right ankle. X-ray taken at that time are normal without any fracture line. But after 2 years, he developed a calcaneovalgus deformity. The diagnosis is - and explain in detail?
Child is presenting with pain after the injury with :-


Normal X-ray → X-rays are normal in physeal injury.
Calcaneo-valgus deformity → Angular deformity due to physeal arrest.


So, this child had developed physeal injury at the time of trauma.

About other options

Any fracture will be seen on x-ray (x-ray is normal in question).
Avascular necrosis of talus develops after fracture of neck of the talus. X-ray shows the fracture (x-ray is not normal).
Ankle ligament injury has normal X-ray, but it will not develop angular deformity.