Dual Commonwealth Games marathon gold medallist Kerryn McCann is facing a new battle with cancer.The champion marathon runner spent the first six months of this year successfully recovering from breast cancer and the debilitating effects of chemotherapy.In May she even went back to running lightly a few days a week.Yesterday, her husband Greg confirmed that doctors were now treating the mother of three for a secondary cancer in her liver."It's not the best of news, but her spirit remains strong," he said from their Coledale home."She has always been a very positive person."We are now trying to deal with the situation each day."Family and friends have rallied around the couple to support McCann during her latest health crisis.A fortnight ago the couple celebrated the christening of their son Cooper, who was born in September last year.It was during her pregnancy with Cooper that she first noticed a lump in her breast, but ignored it for six months after assuming it was connected to the pregnancy.In August last year, 31 weeks into her pregnancy, surgeons removed a tumour the size of a 10[PI9014]Centsymb piece.McCann was then forced to wait a further three weeks before starting chemotherapy, so that Cooper could be born safely.The strength of mind and body that made her one of the best women marathon runners Australia has produced, aided her recovery.So too, did the support given her by breast cancer survivor Jane McGrath, wife of Australian fast bowler Glenn McGrath, who sadly succumbed to the disease just over three months ago.McCann threw her energies into raising awareness of breast cancer and fundraising and earlier this year was appointed an ambassador for Wollongong charity KidzWish.She became a household name after winning the marathon gold medal at the 2002 Manchester Commonwealth Games and again at the 2006 Melbourne Games.