All the chapters in the text have been thoroughly revised, updated and enlarged in this edition of the book. The book is designed according to the CBME Guidelines Competency Based | Undergraduate Curriculum for the Indian Medical Graduate prescribed by National Medical Commission. More than 200 new clinical photographs and colour diagrams have been included in this edition to help build basic concepts of the subject. Text is written in a simple and easy to understand language. Multiple choice questions have been given at the end of each chapter to facilitate the students in assessing their learning.