Saint Vincent Hospital 1 article published in JoVE Biology Pancreatic Islet Embedding for Paraffin Sections Yahui Kong1, Pantea Ebrahimpour1,2, Yu Liu3, Chaoxing Yang1, Laura C. Alonso1 1Diabetes Center of Excellence, UMass Medical School, 2Department of Medicine, Saint Vincent Hospital, 3Department of Pathology, Morphology Core, UMass Medical School Ex vivo pancreatic islet studies are important for diabetes research. Existing techniques to study cultured islets in their native 3-dimensional architecture are time consuming, inefficient, and infrequently used. This work describes a new, simple, and efficient method for generating high-quality paraffin sections of whole cultured islets.