Prader-Willi syndrome in a girl with 47,XX + mar karyotype.
D002675:Child, Preschool; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics; D007621:Karyotyping; D009123:Muscle Hypotonia / Q000235:genetics; D009765:Obesity / Q000235:genetics; D011218:Prader-Willi Syndrome / Q000235:genetics*