title: A 5-month-old boy with delay in growth and development and decreased muscle tone.
authors.affiliation: Department of Pathology and Immunology, Division of Laboratory Medicine.
authors.forename: Vishwanathan
authors.initials: V
authors.lastname: Hucthagowder
authors.affiliation: Department of Pediatrics, Division of Genetics and Genomic Medicine, Washington University School of Medicine, St. Louis, MO.
authors.forename: Marwan
authors.initials: M
authors.lastname: Shinawi
authors.affiliation: Department of Pathology and Immunology, Division of Laboratory Medicine, clockwood@path.wustl.edu.
authors.forename: Christina M
authors.initials: CM
authors.lastname: Lockwood
mesh_terms: D000465:Algorithms; D017204:Angelman Syndrome / Q000150:complications / Q000235:genetics*; D004252:DNA Mutational Analysis / Q000379:methods*; D006130:Growth Disorders / Q000150:complications / Q000235:genetics*; D006801:Humans; D007223:Infant; D008297:Male; D009123:Muscle Hypotonia / Q000150:complications / Q000235:genetics*; D011218:Prader-Willi Syndrome / Q000150:complications / Q000235:genetics*