Marc Tewfik is an Associate Professor in the Department of Otolaryngology – Head and Neck Surgery at McGill, and Director of the Advanced Rhinology and Endoscopic Skull Base Fellowship program. He completed residency concurrently with a Master of Science degree investigating genes responsible for innate immunity and chronic rhinosinusitis. Dr. Tewfik subsequently completed a fellowship in South Australia, under Professor Peter-John Wormald. His current practice is divided between tertiary rhinology and endoscopic skull base surgery. Dr. Tewfik is co-editor of a textbook in Otolaryngology, and has been invited as faculty at advanced sinus surgery courses around the Globe. He is also the course director for the North American Masterclass in Endoscopic Sinus Surgery. His research interests include the role of innate immunity in chronic rhinosinusitis, surgical simulation training, as well as the repair of large skull base defects.

Prof. PJ Wormald is Chairman of the Dept. Otolaryngology Head & Neck Surgery at Adelaide University in Australia. He is the Professor of Skull Base Surgery in the Neurosurgical Department. He is currently recognized as a leader in Sinonasal Disorders, FESS, and Anterior Skull-Base Surgery. His medical practice and research interest are devoted to rhinology and skull base surgery. He has developed an animal model for eosinophilic sinusitis and of major vascular trauma, to study various aspects of these disorders. Other research includes the role of the immune system and biofilms as etiologies of chronic rhinosinusitis. He is also involved in development of new clinical treatments and surgery for sino-nasal disorders. Prof. Wormald is frequently an invited guest speaker to medical conferences on sino-Nasal Disorders and Endoscopic skull-Base Surgery. He is recognised as a lecturer and teacher. He has authored nine books, 44 chapters, and over 350 peer-reviewed articles. In 2005, he authored a best-selling textbook on FESS -Endoscopic Sinus Surgery – Anatomy, 3-D Reconstruction, and surgical Technique (translated to multiple languages), and has now completed a second and third edition. He has particular teaching interests in the Anatomy of the Sinuses, Frontal Sinus Surgery, and Anterior Skull-Base Surgery.

Dr. David Chan obtained his Medical Degree from the University of Ottawa, and then completed an Otolaryngology Head and Neck Surgery Residency at McGill University. During his residency, he also obtained a Master’s of Science degree at McGill University. This was followed by a Fellowship at Flinders Medical Center in Adelaide, Australia, where he sub-specialized in Advanced Rhinology and Endoscopic Skull Base surgery under Eng Ooi and Rowan Valentine. Dr Chan currently practices at Saint Mary’s Hospital in Montreal.

Dr. Saul Frenkiel presently serves as Professor of the McGill Department of Otolaryngology - Head and Neck Surgery. He was the past Chief of Otolaryngology-Head and Neck Surgery at the MUHC and at the Jewish General Hospital.

His previous significant positions include President of the Canadian Society of Otolaryngology - Head and Neck Surgery, Executive Committee member of the Association d’otorhinolaryngologie-cervicofaciale du Quebec, Associate Editor of the Journal of Otolaryngology - Head and Neck Surgery and Royal College of Physicians and Surgeons of Canada Fellowship Examiner.

Dr. Frenkiel has been a frequent Visiting Professor to University training programs and has delivered numerous lectures to National and International Societies. He has been a Course Director for many workshops on endoscopic sinus surgery. He was also invited to be the Millennium Lecturer in Rhinology for the Canadian Society of Otolaryngology - Head and Neck Surgery. He has over 150 publications, including textbook chapters, peer-reviewed and periodical articles, and multi-media works. He has also co-authored the Canadian National Guidelines on Rhinitis and Sinusitis.

Dr. Frenkiel’s clinical interests are in the sub-specialty of rhinology and endoscopic sinus surgery. His research activities have included work on the molecular biology of chronic sinusitis, mucociliary physiology, and nasal airflow testing. His current research interests involve the newer technology of virtual sinuscopy.

Dr. Joseph S. Schwartz is an Otolaryngology-Head & Neck Surgeon with subspecialty expertise in advanced rhinology and endoscopic skull base Surgery. He currently serves as an Assistant Professor in the Department of Otolaryngology-Head & Neck Surgery at McGill University. He completed his medical school training at l’Université Laval in Quebec City in 2010. He then completed his residency surgical training in Otolaryngology – Head & Neck Surgery at McGill University while simultaneously working towards a Masters degree in Otolaryngology-Head & Neck Surgery. The focus of Dr. Schwartz’s Masters research comprised the immunomodulating properties of commensal and pathogenic bacteria in Chronic Rhinosinusitis. Dr. Schwartz then went on to complete a fellowship in Rhinology & Endoscopic Skull Base Surgery at the University of Pennsylvania under the tutelage of Drs.David W. Kennedy, Noam A Cohen, Nithin D. Adappa, James N. Palmer and Bert W. O’Malley.

Dr. Schwartz’s surgical expertise includes complex frontal and revision sinus surgery, sinonasal, orbital and skull base tumors in adults and children, CSF leaks and encephaloceles. Dr. Schwartz has dedicated and continues to dedicate a substantial portion of his time to producing translational and innovative research that seeks to optimize the management of disease processes afflicting his patients. He has contributed over 35 peer reviewed scientific journal articles and conference presentations, multiple invited book chapters and approximately $100,000 in peer-reviewed research grant funding.

Dr. Mahmoud Abdullah Alageeli is an Associate Professor in the Department of Otolaryngology – Head & Neck Surgery at McGill University and a practicing surgeon at the McGill University Health Centre in Montreal, Quebec.

He specializes in advanced rhinology and skull base surgery, with clinical and academic interests that include endoscopic sinus surgery, sinonasal tumors, and minimally invasive approaches to the anterior skull base. Dr. Alageeli is deeply engaged in surgical education and contributes actively to the training of residents and fellows.

Widely respected for his expertise and precision, Dr. Alageeli is a frequent speaker at national and international conferences and continues to advance the field through his dedication to patient care, academic scholarship, and innovation in surgical techniques.

Dr Yvonne Chan is an Assistant Professor and the Continuing Professional Development Director in the Department of Otolaryngology-Head & Neck Surgery at the University of Toronto. She finished her Otolaryngology residency training at the University of Toronto and subsequently completed a Rhinology fellowship at the Georgia Nasal and Sinus Institute. Dr. Chan obtained her medical degree and a Master’s of Science degree in molecular genetics and molecular biology also from the University of Toronto. At the Mississauga Academy of Medicine, she is the undergraduate medical lead for Otolaryngology. Her clinical practice at Trillium Health Partners has a focus in advanced rhinology and endocrine surgery. Since 2015, she has been the co-editor of the world renowned Otolaryngology textbook, K. J. Lee’s Essential Otolaryngology 11th edition. Given her interests in education, she has co-authored a number of textbooks in the past few years in different areas of Otolaryngology – Head & Neck Surgery.

Dr Desrosiers did both medical school and his otolaryngology residency at the University of Montreal. Post-graduate training in nasal diseases at the Johns Hopkins Allergy and Asthma Institute followed his ENT training. He is currently a Clinical professor Université de Montréal and an Associate Clinical Professor at McGill University in Montréal, Canada.

Dr. Desrosiers specializes in nasal and sinus disorders, with special interests in medical management of difficult to treat sinus disease and endoscopic surgery of the paranasal sinuses and skull base. Current research focuses are interactions of the microbiome and immunoregulation of the sinus mucosa, host genetics and biomarkers in sinusitis, and endoscopic skull base surgery.

Dr Desrosiers is an internationally recognized expert in the field of chronic sinusitis. Previous efforts from this group have been seminal in demonstrating the functional link between bacterial biofilms and chronic sinusitis, leading to the identification of bacterial biofilms as an important therapeutic target and fostering the current development of several varied anti-biofilm strategies. The current ongoing research efforts in genetics and biomarkers of CRS have offered a new appreciation of different phenotypes in sinus disease and suggested new applications for extant medications. Implications of the microbiome research have led to the development of a topical probiotic formulation for the sinuses currently undergoing clinical trials.

The continued involvement of Dr Desrosiers with the clinical management of CRS patients ensures continued consideration of the results of the studies into clinically relevant concepts and translational research of these effects in a human population.

2001 MD, University of Vienna, Austria
2001-2005 Research Associate, ENT Clinic, University of Dresden Medical School, Technical University of Dresden, Germany
2006-2007 Academic Trainee, MNI, McGill University
2008-2009 Postdoc, Ste.-Justine Hospital, University of Montreal
2010 Visiting Scientist, Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, PA
2010-2013 Postdoc, Department of Psychology, University of Montreal
Since 2013 Regular Researcher, Sacré-Coeur Hospital, CIUSSS-NIM, Montreal
Since 2014 Professor, Department of Anatomy, University of Quebec in Trois-Rivières, QC
Current position: Full Professor

Dr Nathalie Gabra completed her medical school at Université de Montréal followed by residency training in Otolaryngology-Head and Neck surgery at McGill University. She then completed fellowship training in rhinology and skull base surgery at McGill University under the mentorship of Dr Marc Tewfik. She also completed a Masters degree at McGill University with a thesis on stem cell regeneration and 3D printing for airway reconstruction. She obtained the American board of Otolaryngology in 2022. She is currently working at the CISSS des Laurentides as well as being an associate member of the McGill University Otolaryngology- Head and neck surgery department. Her practice is focused primarily on endoscopic sinus surgery and functional rhinoplasty.

Dr. Gall graduated from the Max Rady College of Medicine at the University of Manitoba in 1994.  He then began an Otolaryngology-Head and Neck Surgery residency at the University of Manitoba, graduating in 1999.  Upon completion of his residency he began a Rhinology fellowship at the University of Toronto under the supervision of Drs. Ian Witterick and Michael Hawke.

After completion of his fellowship Dr. Gall returned to Winnipeg in 2000, where he began his career in private practice.  He is currently an assistant professor in the Department of Otolaryngology-Head and Neck Surgery at the University of Manitoba, Section head of Otolaryngology-Head and Neck Surgery at St. Boniface Hospital, a Simulation Educator in the Clinical Learning and Simulation Program and is director of the Canadian National Resident Sinus Surgery Course for the past 23 years.

Dr. Himdi completed her medical studies at Laval University and her otolaryngology residency at Sherbrooke University. She graduated from the Royal College of Physicians and Surgeons of Canada in 2016. In addition, she completed a fellowship training in sinus and skull base surgery at McGill University under the mentorship of Dr Marc Tewfik and Dr Anthony Zeitouny. She is an associate member at the McGill University Health Center at Lachine Hospital and an active member at Le Suroît hospital. She is also involved in the surgical teaching of McGill otolaryngology residents.

Dr. Sarah Khalife is a Rhinologist and Skull Base Surgeon at Hamilton Health Sciences, and an Assistant Professor in the Division of Otolaryngology – Head and Neck Surgery at McMaster University. She completed her residency in Otolaryngology- Head and Neck Surgery at McGill University and her fellowship in Advanced Rhinology and Skull Base Surgery at Rush University in Chicago, Illinois. Dr. Khalife has been very engaged in leadership positions, committees, and research throughout her training. She was awarded the Canada Graduate Scholarship by the Canadian Institution of Health Research and the Best Senior Resident Research Award by McGill University for her master’s research on Pseudomonas aeruginosa biofilms.

Dr. John Scott is an Otolaryngologist- Head & Neck surgeon in Halifax, Nova Scotia, Canada and is affiliated with Dalhousie University. He obtained his Medical Degree from Dalhousie University and completed his residency training at Western University in 2018. In June 2019 John finished fellowship training in Rhinology and Anterior Skull Base surgery in Adelaide, Australia under the supervision of Professor PJ Wormald and Associate Professor Alkis Psaltis. He enjoys all aspects of endoscopic sinus surgery as well as lacrimal surgery, rhinoplasty, sinonasal tumors and skull base approaches.

Neil Tan is a Consultant Rhinologist at the Royal Cornwall Hospital in the United Kingdom. He completed his ENT training in the East of England and during this period spent two years in Adelaide, Australia where, under the supervision of Prof PJ Wormald, he was awarded a PhD with distinction investigating the role of intracellular bacteria in the pathogenesis of Chronic Rhinosinusitis. After completing training, he undertook two years of sub-speciality fellowships in Anterior and Lateral Skull Base Surgery at Addenbroke’s Hospital, Cambridge and in Advanced Rhinology and Endoscopic Skull Base Surgery in Adelaide, Australia as fellow to Prof PJ Wormald and Prof Alkis Psaltis.

He is an Honorary Senior Lecturer at the University of Exeter Medical School and Research Lead for the British Rhinologic Society and the NIHR Clinical Research Network South West Peninsula. He is a council member of the British Rhinologic Society and British Otorhinolaryngology & Allied Sciences Research Society.

He has a keen interest in medical education and postgraduate training having completed a Master of Education with distinction at the University of Cambridge and currently Chairs the Speciality Training Committee of ENT Trainees in the South West of England. He has taught at FESS courses in North America, Australia and the UK.

Dr. Doron Sommer is an Otolaryngologist/Head & Neck surgeon and Clinical Professor at McMaster University. He completed his medical studies and residency in Otolaryngology at the University of Toronto in 2000 and went on to advanced training in Facial Plastic Surgery. He also specializes in Rhinology and Endoscopic Skull Base Surgery as well as minimally invasive surgical techniques in otolaryngology. He has research interests in surgical techniques in rhinology/skull base surgery, pediatric sleep apnea, smoking cessation and surgical flow & safety measures. He has published many peer reviewed publications as well as several book chapters, and has given numerous lectures, courses and workshops at national and international surgical meetings. Dr. Sommer is an active member of several professional societies and is currently the co-chair of the Royal College of Physicians and Surgeons of Canada Otolaryngology examination board.

Dr. Béatrice Voizard, M.D., M.Sc., F.R.C.S.C., is a Canadian otolaryngologist specializing in endoscopic sinus and skull base surgery. She completed her medical degree, residency in Otolaryngology – Head and Neck Surgery, and a Master’s in Biomedical Sciences at Université de Montréal, followed by fellowship training in advanced rhinology at the St. Paul’s Sinus Centre, University of British Columbia, under Dr. Andrew Thamboo. During her fellowship, she received the Fellow Teaching Award in recognition of her commitment to surgical education.

Dr. Voizard practices rhinology and skull base surgery at Hôpital du Sacré-Cœur de Montréal and Hôpital Cité-de-la-Santé de Laval. Her clinical and research interests focus on minimally invasive surgical techniques, chronic rhinosinusitis with nasal polyps, and interdisciplinary management of complex sinonasal and skull base pathology. She is dedicated to surgical education, contributing to academic teaching, publishing educational materials, and presenting at national and international meetings.

Dr. Ian Witterick is a distinguished otolaryngologist and academic leader in the field of Head & Neck Surgery. He holds an MD and MSc, and is a Fellow of the Royal College of Surgeons of Canada (FRCSC). Dr. Witterick currently serves in the Department of Otolaryngology – Head & Neck Surgery, where he is recognized for his expertise in head and neck oncology, skull base surgery, and rhinology.

A dedicated clinician-scientist, Dr. Witterick has contributed significantly to the advancement of surgical techniques and clinical outcomes in complex head and neck procedures. He is also widely respected for his commitment to medical education and mentorship, having trained numerous residents and fellows throughout his career.

Dr. Witterick has authored and co-authored numerous peer-reviewed publications and has been an invited speaker at national and international conferences. His work continues to influence best practices in otolaryngology and improve patient care worldwide.