A West Yorkshire woman whose leg was amputated due to bone cancer is suing her GP after the disease was not diagnosed for seven months.
Sally Hurst, 29, from Barwick in Elmet, near Leeds, claims her leg might have been saved had she been diagnosed earlier.
Ms Hurst, who works for the BBC, was 25 and planning her wedding when she began to suffer from knee pain in 2004.
A spokesman for Irwin Mitchell solicitors, who are representing Ms Hurst, said she went to her GP the following month when the pain had not improved but was told it was ligament damage and no record was made in her notes.
Ms Hurst was eventually diagnosed with the rare and aggressive bone cancer, osteosarcoma, in April 2005 after tests, X-rays and a biopsy.
The tumour did not respond to chemotherapy and, as it was too late for limb-saving surgery, she had to have a high-level leg amputation in order to save her life.
Rachelle Mahapatra, a solicitor with Irwin Mitchell, added: "This is a rare cancer but despite her continued pleas for help from her GP, her symptoms were dismissed as a sprain.
"When she attended her GP she had some of the classic symptoms of possible bone cancer which should have led the GP to question his diagnosis."