Elle Macpherson has revealed she was secretly diagnosed with cancer seven years ago and has explained why she refused chemotherapy, despite being offered the treatment from 32 doctors.The Australian supermodel, 60, explained in her newly released memoir that she decided not to treat her breast cancer with the usual medical methods.After receiving a lumpectomy seven years ago on Friday 13th, the WelleCo founder was diagnosed with HER2 positive oestrogen receptive intraductal carcinoma.