Out of a total of 120 patients operated on for recurrent ovarian cancer, two at the very best, but possibly not even one, will have a definitive chance of cure. Despite the poor long-term prognosis, as well as the lengthy operation and postoperative treatment involved, it does not seem justified to withhold surgery for recurrent disease totally. In some cases, symptoms can be treated with surgery, such as tumour pain or an impending ileus. In other cases, patients live for 10 years and longer, after multiple operations for relapse, without suffering severe physical symptoms. These are mainly patients with circumscribed, solitary, and very slowly growing tumours, in which cases, it is possible to remove the tumour again and again by surgery. The most relevant prognostic factors include the size of the residual tumour left at the primary operation, the time between the primary operation and the recurrence of the tumour, the type of growth of the recurrent tumour, as well as the extent of the tumour size reduction achieved at the first recurrence operation.