The ovarian tumours manifest a wide spectrum of clinical and histomorphological features. The present work in the form of this book has been produced to study the common morphological and histological types of primary ovarian tumors. Ovarian tumours are one of the common causes of diagnostic dilemma in the field of medicine. There are wide varieties of ovarian tumours with various clinical manifestations. By bringing out this book I am trying to highlight the nature of few common ovarian tumors and thereby making a sincere effort to ease the diagnosis of ovarian tumours based on their histomorphological features. I hope this book will help medical practitioners, budding up pathologists and students in knowing more about ovarian tumours. I take this opportunity to extend my sincere thanks to all those persons & dignitaries who helped me to complete this work.