You are the pediatrician in charge of monitoring a neonate. He has a small head and ambiguous genitalia. You suspect a genetic disorder in which metabolism of 7-dehydrocholesterol to cholesterol is failed. What is the most likely diagnosis? A- Down syndrome B- WAGR syndrome C- Patau syndrome D- Smith-Lemli-Opitz syndrome E- Cystic fibrosis Answer: http://medical-usmle.com/?p=7759
