Our Team

Dr. Elizabeth Tierney Dolan assumed the leadership of White Rock Dermatology in 2007. A graduate of the University of Texas Southwestern Medical Center at Dallas, Dr. Dolan previously practiced internal medicine in Dallas and Lewisville, Texas, and was an emergency room physician at Dallas’ Presbyterian Hospital and surrounding ERs. Her specialty is general and medical dermatology for adults and teenagers. She was an Air Force brat and has lived many places in her life but calls Dallas home. She has two adult sons and is the very proud grandmother to her new grandson. In her spare time, you can find her babysitting, playing games and at the slot machines in Oklahoma and Mississippi. She has no plans to retire after selling the practice and continues to work Monday-Wednesday.

Dr. Christy Riddle joined White Rock Dermatology in the spring of 2014 and purchased the practice in February 2025. A graduate of the University of Texas Medical School at Houston, Dr. Riddle completed her dermatology residency at the University of Kansas Medical Center. She brings extensive experience across medical, cosmetic, pediatric, and surgical dermatology. Dr. Riddle cares for patients of all ages, including infants, children, teens, adults, and elderly patients. She also performs the practice’s surgical and cosmetic dermatology procedures, combining clinical expertise with a personalized, patient-focused approach to care. A Dallas native, Dr. Riddle is a sustainer in the Junior League of Dallas, which has helped shape her philanthropic nature. She has fostered and adopted through DFW Lab Rescue. Some of you may have met her dogs who occasionally visit the office. Her interests include cooking, reading, Pilates, walking at White Rock Lake and traveling. She is learning Mahjong and keeps working on her Spanish.