Amelia Eldred was seven years old when she needed her leg amputated because of bone cancer.
Having been a keen dancer and sportsperson Amelia and her family were concerned about her quality of life.
Doctors suggested a radical procedure that allows children to have a more active lifestyle compared with other treatment options.
Amelia underwent a rotationplasty, where doctors removed the middle part of her leg then reattached the lower part of her leg only backwards.
Her ankle now acts as her knee joint.
While the surgery may sound and look unorthodox, Amelia's mother, Michelle Eldred, told the BBC she will be able to continue dancing and playing sports "straight away"
"It was the best option for us.'
A rotationplasty is a rare procedure used to treat bone tumours that occur near the knee.
Amelia was diagnosed with osteosarcoma, the most common bone cancer in children.
The cancer caused an aggressive tumour in her left thigh bone.
With her reversed ankle acting as her knee joint, she will have a prosthetic for the lower half of her leg.
Dr Joel Mayerson, an orthopaedic oncologist, told LiveScience, a below the knee amputation requires 20 percent more energy to move around from a patient.
It is preferable to an above the knee amputation, which requires 70 percent more energy of the patient.
Dr Mayerson said, "This is a good alternative to allow them to be very functional with modern prosthesis use."