Home » Videos » Endocrinology » When a Child or Teen has Klinefelter Syndrome When a Child or Teen has Klinefelter Syndrome MenuVideo Menu For Patients & Visitors CHOC Experience Video Guide Mental Health Webinar Archive Mental Health Video Library For Medical Professionals CMEs Virtual Pediatric Lecture Series Our Stories Pediatric endocrinologist Dr. Mark Daniels explains Klinefelter syndrome in children and teens and how it is treated. Learn more about CHOC Endocrinology. Dr. Mark Daniels is board certified in Pediatrics and in Pediatric Endocrinology. Mark Daniels, MD