I'm not sure what the experience of your vet it, but only about 40% of insulinomas return within 10 months, and if a partial pancreatectomy is performed, the average disease-free interval is over a year. I am always hesitant to leave an obviously affected adrenal in for any reason, especially when insulinoma surgery may well be curative. With kindest regards, Bruce H. Williams, DVM, DACVP Join the Ferret Health List at http://groups.yahoo.com/group/Ferret-Health-list [Sukie note: this ferret had both a pancreatic growth and an adrenal growth, but I thought that the re-occurrence numbers would be of interest to many.] [Posted in FML issue 3431]