Ovarian cancer survival varies significantly with subtype. Dysgerminomas have a very favorable prognosis. In early stages, they have a five-year survival rate of 96.9%. Around two-thirds of dysgerminomas are diagnosed at stage I. Stage-III dysgerminomas have a five-year survival of 61%; when treated with BEP chemotherapy after incomplete surgical removal, dysgerminomas have a 95% two-year survival rate. Sex-cord-stromal malignancies also have a favorable prognosis; because they are slow-growing, even those with metastatic disease can survive a decade or more. Low malignant potential tumors usually only have a bad prognosis when there are invasive tumor implants found in the peritoneal cavity.