• The emphasis in this book is on providing evidence-based basic understanding of the subject. • The pathophysiology of diseases has been simplified. • Modes of presentation and approach to investigations are given in a clinically applicable manner. • Therapeutic plan, as given in guidelines, is summarized and presented in a way it has to be used in practice. • Each chapter has been written by an expert in the field. • Language is simple to comprehend. • Enriched with graphs and tables for easy understanding. • Effects of COVID-19 on various systems have been included. • Provides an Indian perspective of the diseases in each chapter. • Includes MCQs in the chapters for revision. • Selected readings can be used for more information on the topic.