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Prader–Willi syndrome (PWS) is a complex multisystem genetic disorder with a prevalence of about 1/10,000–1/30,000. It is also the first known disorder of human genomic imprinting. We report a case of a child with PWS presenting with hypotonia and feeding difficulty in the neonatal period and infancy with characteristic facial features, hyperphagia, early onset of morbid obesity, short hands and feet, intellectual disability, and other behavioral problems.