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Meet Your Thyroid Center Providers


Adam Alder

Adam Alder, M.D., is a surgeon at Children’s Health℠ with interests in pediatric and neonatal surgery. He is Director of the Center for Pectus and Chest Wall Anomalies and Chief of Pediatric Surgery for Children's Health Plano campus. He is a graduate of Tulane University School of Medicine in New Orleans and trained in general surgery at UT Southwestern Medical Center and Parkland Memorial Hospital. Dr. Alder also completed a fellowship in pediatric surgery at Children's Medical Center and UT Southwestern.

Diana Leigh Diesen

Diana Diesen

Diana Diesen, M.D., is a pediatric surgeon and the Pediatric Surgery fellowship program director at Children’s Health℠. Dr. Diesen earned her medical degree at the University of Virginia School of Medicine, completed her residency in surgery at Duke University Medical Center in Durham, North Carolina, and completed her fellowship in pediatric surgery at Children's Health and UT Southwestern Medical Center.

Neil Fernandes

Dr. Fernandes attended the University of Texas Southwestern Medical School. He then went on to complete an internship in Internal Medicine at Presbyterian Hospital of Dallas. He returned to UT Southwestern for residency training in Diagnostic Radiology and a Fellowship in Pediatric Radiology. He joined as staff radiologist at Children’s Health℠ and Assistant Professor of Radiology at UT Southwestern in 2010. He has subspecialty interests in pediatric interventional radiology and pediatric musculoskeletal radiology. He is a member of the Society for Pediatric Radiology, Society for Pediatric Interventional Radiology, American College of Radiology and the Radiological Society of North America.

Elizabeth Lagomarsino

Elizabeth Lagomarsino, M.D. has been a pediatric radiologist at Children's Health℠ since July 2006. Dr. Lagomarsino received her medical degree from the University of Texas Medical School at San Antonio in 2000 and completed a residency in Diagnostic Radiology at the University of Texas Southwestern Medical Center in June of 2005. She completed a one year fellowship in pediatric radiology at UT Southwestern Medical Center/Children's Health in July of 2006. She is board certified in Diagnostic Radiology and holds a Certificate of Additional Qualification in Pediatric Radiology. Her special interests are pediatric interventional radiology, pediatric thyroid tumors, and most recently, adolescent breast imaging.

Ryan Stewart

Ryan Stewart, M.D., earned his medical degree at UT Southwestern Medical Center, completed his internship and residency in pediatrics at Children's Health℠ and completed his fellowship in pediatric endocrinology at UT Southwestern. Dr. Stewart's clinical interests include diabetes and insulin pumps.


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