This book reviews normal anatomy and immunohistochemical profile of sinonasal tract (SNT) and covers histomorphology of infections some of which are unique to Asia, tumor-like lesions, and rapidly evolving spectrum of benign and malignant tumors of SNT. It describes all the entities with the help of over 200 full color photomicrographs with their detailed descriptions. The book includes relevant clinical and radiology photographs and anatomical drawings complemented by short bulleted legends describing the picture and providing relevant information. In addition to surgical pathology, it includes a chapter on the cytology of SNT lesions, which is described rarely in available books and literature. It serves as a concise and informative resource for easy understanding.  The book is written by leading experts in pathology around the world from USA, Europe and Asia. It highlights the expanded role of pathologists in patient care of SNT lesions.