@brendaae My husband's cousin has peritoneal cancer also. It metastasized from the arm of a robot that was used to remove her stage 1 endometrial cancer. She has been treated with hormone therapy (femara and letrazole?, I believe). The nine lesions are no longer visible on a CT scan. I believe this was an experimental protocol developed and written about by MD Anderson in Houston. I think the physician's name is Soliman? This cousin is very pleased.