This book focuses on Partha’s investigations and interpretations in pediatric and adolescent practice. It covers basic and essential investigations which have come out of the experts’ own rich experience over decades will be of great use to the practicing pediatricians in managing common and uncommon selected cases with the right diagnosis and the right treatment in their day-to-day practice. This book consists of 27 chapters, which include newborn, growth and development, nutrition, immunization, infectious disease, neurology, cardiology, pulmonology, gastroenterology and hepatology, nephrology, urology, hematology, oncology, allergy, rheumatology, endocrinology, genetics, poisoning, intensive care, adolescent medicine, dermatology, ophthalmology, investigations and interpretations in pediatric and adolescent practice, pediatric surgery, neurodevelopmental disorder, learning disability, and world health organization standard investigation. It is with this objective in mind, conceived the idea of coming out with ‘Partha’s series of books in Pediatric and Adolescent Practice’ viz. Case Scenarios, Frequently Asked Questions, and Management Algorithms in Pediatric and Adolescent Practice. This book is useful for not only amongst the practicing pediatricians, but also amongst postgraduate students and teaching faculties as well.