This volume is dedicated to the 70th anniversary of the Department of Otolaryngology of the Sapporo Medical University. It commemorates this landmark event and honors the department’s rich tradition of excellence. Chapters feature results of clinical and basic research conducted at the university. The carefully selected articles – ten clinical reviews, ten original research papers, and one case report – reflect the wide range of specialty fields within the department. Topics covered include otology, allergy and rhinology, oncology, sleep medicine, and tonsils. This book is a comprehensive, inspiring contribution to the celebration of one of the oldest departments within the Sapporo Medical University. It contains valuable information for new and experienced otolaryngologists, neurotologists, allergologists, and head and neck surgeons.