This issue of Otolaryngologic Clinics of North America, devoted to Endoscopic Ear and Eustachian Tube Surgery, is guest edited by Drs. Jo�o Fl�vio Nogueira and Muaaz Tarabichi. Articles in this outstanding issue include: Anatomy of the Eustachian Tube; Physiology of the Eustachian Tube; Eustachian Tube Function and Testing; Radiology of the Eustachian Tube; Middle Ear and Eustachian Tube Dysfunction; Endoscopic Eustachian Tube Transnasal Surgery; Endoscopic Anatomy of the Protympanic Space; Outcomes Following Endoscopic Ear Surgery; Endoscopic Management of Superior Semicircular Canal Dehiscence; Endoscopic Management of Tumors in Middle Ear and Mastoid; Outcomes Following Endoscopic Stapes Surgery; Transtympanic Balloon Dilation of the Eustachian Tube; Selective Dysventilation Syndrome; Restoring Petrous Bone Ventilation; and Endoscopic Techniques in Tympanoplasty.

In this issue of Otolaryngologic Clinics, guest editors Drs. Muaaz Tarabichi, Holger Sudhoff, Baher Ashour, and Dennis Poe bring their considerable expertise to the topic of Eustachian Tube Dysfunction. Top experts provide broad and up-to-date overview of this topic, covering anatomy, pathophysiology, clinical presentations, and evolving treatment strategies. They present practical insights and new data regarding diagnostic approaches, surgical and office-based interventions, and emerging technologies such as AI and robotic navigation.

This issue of Otolaryngologic Clinics of North America, devoted to Endoscopic Ear and Eustachian Tube Surgery, is guest edited by Drs. Jo�o Fl�vio Nogueira and Muaaz Tarabichi. Articles in this outstanding issue include: Anatomy of the Eustachian Tube; Physiology of the Eustachian Tube; Eustachian Tube Function and Testing; Radiology of the Eustachian Tube; Middle Ear and Eustachian Tube Dysfunction; Endoscopic Eustachian Tube Transnasal Surgery; Endoscopic Anatomy of the Protympanic Space; Outcomes Following Endoscopic Ear Surgery; Endoscopic Management of Superior Semicircular Canal Dehiscence; Endoscopic Management of Tumors in Middle Ear and Mastoid; Outcomes Following Endoscopic Stapes Surgery; Transtympanic Balloon Dilation of the Eustachian Tube; Selective Dysventilation Syndrome; Restoring Petrous Bone Ventilation; and Endoscopic Techniques in Tympanoplasty.

In this issue of Otolaryngologic Clinics, guest editors Drs. Muaaz Tarabichi, Holger Sudhoff, Baher Ashour, and Dennis Poe bring their considerable expertise to the topic of Eustachian Tube Dysfunction. Top experts provide broad and up-to-date overview of this topic, covering anatomy, pathophysiology, clinical presentations, and evolving treatment strategies. They present practical insights and new data regarding diagnostic approaches, surgical and office-based interventions, and emerging technologies such as AI and robotic navigation.