Like previous editions, this text is presented in a concise and lucid form with line diagrams, boxes, tables, differentiations, and flowcharts are colored and designed to make the book interesting to read, easy to comprehend, recollect, and reproduce. Colored images from several clinical case studies have been added to make the concept clearer. Additionally, colored boxes in the form of “Pearls” have been added to highlight salient features/points. “Mnemonics” have been included wherever possible. Interesting anecdotes and facts, concepts, theories, recent advances, and topic-related information have been added wherever needed. Older terminologies have been discarded and newer ones introduced. There are some new innovative ideas which will help the reader in understanding the topic in a better way—colored images featuring clinical cases/postmortem have been incorporated after completion of the topic along with thought-provoking questions that the readers can deal with confidently when they actually come across similar cases. There is a separate table of “High Yield” at the end of each chapter which gives a summary of important definitions and points—take-away messages from the chapter. Additionally, a case report is given at the end (after “high yield”) pertaining to some topic already discussed in the chapter (as suggested by few students). This will create more interest and will help in retaining the information in the long run. Another innovative approach is the addition of “QR codes” to select topics which the reader can utilize to watch the video for better understanding of the concept. The Multiple Choice Questions (MCQs) from recent PG entrance examinations are included as online content for the students which they can access with the unique code provided along with each book. This will help the reader to get an insight into that topic and prepare for viva-voce and subsequent postgraduate entrance examinations (INCET/NEET/NEXT).