Dean Yimlamai, MD, PhD, is a physician-scientist at UPMC Children's Hospital of Pittsburgh and is trained as a clinical gastroenterologist. He specializes in gastroenterology with an interest in pediatric liver diseases and liver tumors. His research group uses mouse models to understand the fundamental mechanisms of liver growth during development, its restoration from injury and changes that lead to cancer. His group specializes in the Hippo Signaling Pathway, a relatively recently recognized signaling pathway that controls organ growth and regeneration.