Ms O'Shea's amazing and bizarre flexibility is the result of an operation following the treatment of a rare form of bone cancer.
After being diagnosed with Ewing's sarcoma, she underwent a right internal hempipelvectomy in 2011 in which surgeons removed the entire right side of her pelvis without replacing it.
The brave patient has endured months of physiotherapy to learn how to walk again but only realised she could twist her leg last year and was shy about showing her friends.
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