A Study of Weekly Tisotumab Vedotin for Patients With Platinum-Resistant Ovarian Cancer With Safety Run-in (innovaTV 208)

This trial will study tisotumab vedotin to find out what its side effects are and to see if it works for platinum-resistant ovarian cancer (PROC). It will test different doses of tisotumab vedotin that are given at different times. It will also compare the side effects and ability to treat tumors of these different doses and schedules. In this study, there will be a safety run-in group of approximately 12 patients that will look at a dose-dense treatment schedule. In a dose-dense schedule, smaller doses are given more frequently. In addition to the safety run-in patients, there will be three groups in the study. One group will get tisotumab vedotin once every 3 weeks (21-day cycles). The two other groups will get tisotumab vedotin once a week for 3 weeks followed by 1 week off (28-day cycles).