Hanna Borysewicz-Sańczyk, MD, PhD, is an assistant in the Department of Pediatrics, Endocrinology, Diabetology with Cardiology Division, Medical University of Bialystok. She is a pediatrician and clinical pediatric endocrinologist and diabetologist. Her research interests include thyroid ultrasonography, elastography, thyroid pathology and endocrine autoimmune diseases in children. She is a member of Polish Society of Pediatric Endocrinology and Diabetology (PTEIDD) and European Society for Paediatric Endocrinology (ESPE).