Hi and welcome to HCM. Thank you for your querry. I am sorry about your wife and this serius diagnosis. It is hard to predict such things and depends from men to men. Statisticaly for stage IV ovarian cancer, the 5-year survival rate is 17.5%,but spreading to coccigis isnt good sign. More important than survival rates it to give all possible support and encourage her to fight and make her easy to bear with this situation. WIsh you good luck.