Otolaryngology is a branch of medicine that uses surgical procedures to deal with the conditions of ear, nose and throat. It also deals with the treatment of head and neck. There are various sub-specialties of otolaryngology such as head and neck oncological surgery, rhinology and sinus surgery, and neurotology. Head and neck oncological surgery include microvascular reconstruction, endocrine surgery, surgical oncology and endoscopic surgery. It also includes the treatment of oral cancer, skin cancer, thyroid cancer, and salivary gland cancer. Rhinology and sinus surgery deals with sinusitis allergy and anterior skull base. While, neurotology focuses on the middle and inner ear, temporal bone, skull base surgery, dizziness and cochlear implant. This book explores all the important aspects of otolaryngology in the present day scenario. It aims to present researches that have transformed this discipline and aided its advancement. For someone with an interest and eye for detail, this book covers the most significant topics in the field of otolaryngology.