Paediatricsmiddle twist
You are drawing a three-generation pedigree for a 7-year-old girl referred with recurrent headaches. Her mother mentions that the child's father, from whom she separated last year, was diagnosed with Huntington disease at 41 and now lives interstate. The girl is well, developing normally and has no neurological signs; her headaches are episodic, relieved by sleep, and there are no red flags. Her mother asks you to arrange a blood test so that the family knows where it stands before high school. Which one of the following is the most appropriate response to her request?