Known as a rotationplasty, his surgery involved removing a large section of his right leg that surrounded the tumour - from below his knee to about mid-thigh - then reattaching the lower limb to the shortened upper thigh.
The twist, so to speak, is that Dugan's lower leg was rotated 180 degrees and sewn on backwards.
His ankle now acts as his knee, his calf has replaced the lower part of his thigh and his backwards-facing foot slips into a prosthetic and powers the reversed muscles and joint with an up-and-down motion.
"I'll be able to play basketball and baseball - baseball's my favourite sport," says Dugan, a seventh grader who pitches and plays first base on his junior high school's baseball team in Fostoria, Ohio. "Just knowing I would be able to play those made my mind go straight at it."
It took 18 months of physical therapy for Dugan to learn a new way to use his leg. Now 13, he is playing baseball again. Link -via J-Walk Blog