School of Medicine


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  • Tulio Valdez, MD, MSc

    Tulio Valdez, MD, MSc

    Professor of Otolaryngology - Head & Neck Surgery (OHNS) and, by courtesy, of Pediatrics

    BioDr. Tulio A Valdez is a surgeon scientist born and raised in Colombia with a subspecialty interest in Pediatric Otolaryngology. He attended medical school at Universidad Javeriana in Bogota Colombia before undertaking his residency in Otolaryngology, Head and Neck Surgery in Boston. He completed his Pediatric Otolaryngology Fellowship at Texas Children’s Hospital (2007), Houston and obtained his Master’s in Clinical and Translational Research at the University of Connecticut.

    Clinically, Dr. Valdez has an interest in pediatric sleep apnea. He has a special interest in the management of sinus disease in cystic fibrosis. Dr. Valdez has co-authored one textbook and numerous book chapters and scientific manuscripts. Dr. Valdez continues his clinical research in these areas, particularly with a focus on aerodigestive disorders.

    Scientifically, Dr. Valdez has developed various imaging methods to diagnose otitis media and cholesteatoma a middle ear condition that can lead to hearing loss. He was part of the Laser Biomedical Research Center at the Massachusetts Institute of Technology. His research includes novel imaging modalities to better diagnose ear infections one of the most common pediatric problems. His research has now expanded to include better intraoperative imaging modalities in pediatric patients to improve surgical outcomes without the need for radiation exposure. 

    Dr. Valdez believes in multi-disciplinary collaborations to tackle medical problems and has co-invented various medical devices and surgical simulation models.

  • Perla Villamor

    Perla Villamor

    Clinical Instructor, Otolaryngology (Head and Neck Surgery)

    BioPerla Villamor, MD, is a Clinical Instructor in the Clinician Educator line in the Department of Otolaryngology — Head & Neck Surgery and the Division of Pediatric Otolaryngology at Stanford University School of Medicine. She completed her medical and otolaryngology training in Colombia, followed by a pediatric otolaryngology fellowship in Mexico.
    She has extensive experience in research, teaching, and clinical practice, having worked in leading institutions across Latin America and the Middle East.
    Her passion for pediatric airway surgery has driven her to collaborate on global surgery initiatives and contribute to international scientific publications. She is deeply committed to working with children and their families to improve their quality of life and ensure they experience happy, healthy childhoods. She is currently pursuing a two-year International Fellowship in Complex Pediatric Otolaryngology at Stanford Children’s Hospital.