✔ 最佳答案
Rotationplasty (e.g. Van Nes Rotation) - a procedure where the lower portion of the leg is rotated 180° and reattached - the ankle acts like a knee joint, providing extra function.
http://www.waramps.ca/nac/terms/faqvnes.html
ROTATIONPLASTY is a surgical procedure that may be appropriate for children with severe congenital femoral deficiency or children with malignant tumors of the femur or proximal tibia.
http://www.encyclopedia.com/doc/1G1-150862609.html