A young woman had to have her leg amputated after a small lump on her shin doctors had said was “nothing to worry about” turned out to be cancerous. Matilda Peachey, from Herne Bay, was diagnosed with chondroblastic osteosarcoma of the lower leg – a rare type of bone tumour – in March. Since then, the 20-year-old has gone through tough chemotherapy, causing “brutal” side effects such as hearing loss, sepsis, internal ulcers and heart issues. In July, Matilda had surgery to amputate her leg above the knee to stop the cancer from spreading. The former Herne Bay High pupil told KentOnline: “It wa…