My son is now 4. Diagnosed with Jacobs Syndrome. He was born a normal baby and grew really big really fast. As a toddler had speech problems. now has behavior problems and still really large. Doctors constantly ran tests for thyroid, sugar, cushings disease, finally ran genetics test and found out my son has Jacobs syndrome also known as 47 xyy syndrome.
It was my endocrinologist who diagnosed him and says its rare and she doesnt know alot about this consdition. We are currently waiting for an appt at childrens hospital with the genetics dept for further information.
And are still searching for more info on my sons condition.