For an elderly woman with a platinum-resistant recurrence of a high-grade serous ovarian cancer who has been rendered NED surgically, is observation a reasonable approach?  

Based on her age, performance status, and goals of care, it is certainly reasonable to discuss all options with patients. With her being platinum resistant, I would counsel on prognosis and the need to consider quality of life. With the need for balance between QoL and OS, waiting until there is a m...