Endocrine Abstracts

Background: Neuroendocrine tumor (NET) grade, which utilizes Ki-67 expression, is a useful prognostic tool and aids in treatment decisions. However, it is not well known how these measures evolve over time. This retrospective review evaluates changes in Ki-67 and grade over time in patients with multiple NET tissue samples.Methods: 77 patients were included (44M; mean age 58±9.5 years at first sample). Primary NET sites included 46 small bowel, 21 pan...