Clinical information on 30 of the most common genetic syndromes. Each chapter deals with a different condition, and all the chapters generally follow the same format. Introductory sections on incidence, diagnostic criteria, etiology and pathogenesis, diagnostic testing, and differential diagnosis are followed by detailed descriptions of the nature, evaluation, and treatment of major disease manifestations. The emphasis is on clinical evaluation and management, but few of the recommendations derive from randomized, controlled trials or rigorous epidemiologic studies. Rather, what is usually presented is the extensive anecdotal experience of the authors.