"Now, results of a large NCI-sponsored clinical trial, GOG-0213, show that this secondary surgery does not improve how long patients with recurrent ovarian cancer live. Indeed, the findings suggest that women who have additional surgery may fare worse than those who do not. “These highly-anticipated results call into question our standard practice,” said Yovanni Casablanca, M.D"

https://www.cancer.gov/news-events/cancer-currents-blog/2019/ovarian-cancer-surgery-recurrent-survival