Patients don't present with a disease; they present with symptoms. Using a practical, symptom-based organization, Nelson Pediatric Symptom-Based Diagnosis: Common Diseases and their Mimics, 2nd Edition, offers authoritative guidance on differential diagnosis and treatment of diseases and disorders in children and adolescents, and covers the symptoms you're likely to see in practice, their mimics, and uncommon disorders. Drs. Robert M. Kliegman, Heather Toth, Brett J. Bordini, and Donald Basel walk you through what to consider and how to proceed when faced with common symptoms such as cough, fever, headache, autistic-like behaviors, chronic pain, chest pain, gait disturbances, and much more. Begins with a presenting symptom and leads you through differential diagnosis and a concise review of treatment recommendations. Contains more than a dozen new topics including Disease Mimics: An Approach to Undiagnosed Diseases, Autistic-like Behaviors, Shock, Hypertension, Neurocognitive and Developmental Regression, Chronic Pain, Hypertonicity, Movement Disorders, Hypermobility, and more. Features a new focus on symptoms of rarer diseases that are mimics of more common diseases. Offers a user-friendly approach to Altered Mental Status such as coma and other CNS disorders, with numerous clinically useful tables and figures to guide clinical decision making in various care settings. Uses a highly templated format for easy reference and quick answers to clinical questions, with the same consistent presentation in each chapter: History, Physical Examination, Diagnosis (including laboratory tests), Imaging, Diagnosis, and Treatment. Includes numerous full-color illustrations, algorithms, tables, and "red flags" to aid differential diagnosis. Serves as an ideal companion to Nelson Textbook of Pediatrics, 21st Edition. Content in this book is referenced and linked electronically to the larger text, providing easy access to full background and evidence-based treatment and management content when you own both references. Enhanced eBook version included with purchase. Your enhanced eBook allows you to access all of the text, figures, and references from the book on a variety of devices.

In this issue of Critical Care Clinics, guest editors Drs. Robert M. Kliegman and Brett J. Bordini bring their considerable expertise to the topic of Undiagnosed and Rare Diseases in Critical Care. Top experts in the field cover key topics such as critical genetic arrhythmia disorders, uncommon causes of rhabdomyolysis, status epilepsy syndromes, autoimmune encephalitis, rapid-onset paralysis and weakness, and more. Contains 17 relevant, practice-oriented topics including understanding cognitive diagnostic errors in the ICU; rapid WES/WGS in the ICU; diagnostic time-outs to improve diagnosis; when "sepsis" is not sepsis: MAS, HLH, malignancies and other sepsis mimics; all that wheezes is not asthma or bronchiolitis; and more. Provides in-depth clinical reviews on undiagnosed and rare diseases in critical care, offering actionable insights for clinical practice. Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.

Dr. Kliegman and Dr. Bordini have written a primer on Undiagnosed and Rare Diseases in Children. Leading experts have presented the current knowledge in the following areas: How Doctor's Think: Common Diagnostic Errors in Clinical Judgment; Team-Based Approach to Undiagnosed and Rare Diseases; Ending a Diagnostic Odyssey: Family Education Counselling and Their Response to Eventual Diagnosis; Eczema and Urticaria as Manifestations of Undiagnosed and Rare Diseases; Usual and Unusual Manifestations of Familial Hemophagocytic and Langerhans Cell Histiocytosis Syndromes; When Autistic Behavior Suggests a Disease Other than Classic Autism; Non-classic Inflammatory Bowel Disease in Young Infants; IPEX and Other Disorders; Usual and Unusual Presentation of Mitochondrial Disorders; When to Suspect Auto-inflammatory/Recurrent Fever Syndromes; Primary and Secondary Causes of Autonomic Dysfunction; Usual and Unusual Manifestations of Systemic and CNS Vasculitis; Fever of Unknown Origin; Differentiating Familial Neuropathies from Guillain-Barre Syndrome; and Munchausen by Proxy: A Factitious Undiagnosed Disease. Readers will come away with cutting-edge information to use immediately in their clinical management of patients.

In collaboration with Consulting Editor, Dr. Lucky Jain, Drs. Robert Kliegman and Bret Bordini have put together topics that provide a current clinical update on the treatment and management of undiagnosed and rare diseases in the neonate. Expert authors have contributed clinical review articles on the following topics: Neonatal Liver Failure; Neonatal Autoinflammatory Disorders; Rare or Unusual Dermatologic Disorders In Neonates; Neonatal Immune Deficiency; Congenital Diarrhea Syndromes; Nonimmune Hydrops; DNA Depletion Syndromes; Genomic Approach to Dysmorphology Syndromes; Nonimmune Anemias; Severe Metabolic Crisis (Metabolic Acidosis, Unresponsive Hypoglycemia, Hyperammonemia); Heterotaxia Syndromes; Neonatal Appendicitis; Avoiding Diagnostic Errors in Neonatology; and Differentiating Congenital Myopathy from Congenital Muscular Dystrophy. Readers will come away with the information they need to improve outcomes in the neonate.