Mr Chadwan Al Yaghchi is a consultant laryngologist at the National Centre for Airway Reconstruction, Imperial College Healthcare, London. He manages the full spectrum of laryngeal disorders with specialist interest in airway stenosis and complex dysphagia. Mr Al Yaghchi holds a PhD in Molecular Oncology from Queen Mary’s University of London studying oncolytic viruses in head and neck cancers. In addition, he has an active clinical research program in voice, airway and swallowing disorders.

Mr Al Yaghchi is a founding member of the British Laryngological Association and the president-elect. He is the deputy general secretary of the Eropean Laryngological Society and Board member of the International Association of Transvoice Surgeon. He is a board member of the UK Swallowing Research Group and former Vice president of the Royal Society of Medicine, Section of Laryngology and Rhinology.

Dr. Katherine Yung is a laryngologist and Director of Laryngology at Sutter California Voice and Swallowing in San Francisco. With a lifelong background in music, she was drawn to laryngology’s intersection of artistry and medicine. She previously spent a decade on the faculty at the University of California, San Francisco, where she served as Acting Director of the UCSF Voice and Swallowing Center, was promoted to Associate Professor of Clinical Otolaryngology, and received the Sooy Award for Clinical Excellence. She later founded San Francisco Voice & Swallowing, nationally recognized for professional voice and gender-affirming voice care.

Dr. Yung consults for the Berkeley Repertory Theatre, Broadway SF, and San Francisco Opera and is a member of the International Association of TransVoice Surgeons. 

Since 1999, my medical and surgical practice has been limited to voice care. I maintain an

informational web site on voice disorders - voicedoctor.net, preceptor medical students in their

early years at Oregon Health Sciences University, offer an international fellowship in laryngology as

well as short observerships to physicians, speech therapists, voice teachers and interested students.

I produce “voxdoc, the voicedoctor” on YouTube, including Laryngology 101, a series of learning

videos. I published “Why is there a frog in my throat? A guide to hoarseness.” I frequently lecture

internationally on laryngology and phonosurgery. I remain surprised at how much there is still to learn

about the larynx.

Dr. Elad Azizli is an ENT (Ear, Nose, and Throat) specialist based in Istanbul, Türkiye, where he runs his private practice. He graduated from medical school and subsequently completed his residency in Otorhinolaryngology–Head and Neck Surgery.

Over the past decade, Dr. Azizli has dedicated his career to the subspecialty of laryngology, with a particular focus on voice and airway surgery. His main areas of expertise include voice feminization surgery and voice deepening (masculinization) procedures, which he has performed extensively for both national and international patients.

Dr. Azizli applies advanced surgical techniques such as glottoplasty, laser reduction glottoplasty, and cricothyroid approximation, along with other structural approaches tailored to individual patient needs. Through these procedures, he has developed significant experience in modifying fundamental frequency and achieving stable, natural-sounding results.

In addition to his surgical work, Dr. Azizli actively contributes to academic research and international conferences. His publications and presentations reflect his ongoing commitment to advancing the field of laryngology, with special emphasis on improving outcomes in gender-affirming voice surgery.

By combining technical expertise with patient-centered care, Dr. Azizli has established himself as a trusted voice specialist and a recognized name in this highly specialized area of ENT practice.