This book provides a comprehensive, up-to-date review of the field of diagnostic histopathology of sinonasal tumors and tumor-like lesions. It includes well-known and recently described structures, focusing on their epidemiological, clinical, radiological, and molecular features. It also discusses the latest surgical and medical treatment of these tumors. Primarily written for pathologists and pathology residents, the topics discussed make it a valuable resource for head and neck surgeons, radiologists, oncologists, and other clinical physicians.