Vickie, I don't know more about the pituatary but the mention of Hyperlexia with all of Jayme's other medical issues did make me think of something. I'm very familiar with Hyperlexia as my difficult child is Hyperlexic. Most of the children with Hyperlexia have it associated with Autistic Spectrum Disorders, Nonverbal Learning Disabilities, or being highly gifted. There is a rare disorder called Williams Syndrome in which a small percentage of the effected children also display Hyperlexia. Kids with WS have a number of the issues that you have mentioned along the way: kidney problems, circulatory system, Learning Disability (LD), motor skills, sleep problems, having an Autistic flavor but doesn't quite fit Autism criteria, etc.
http://www.williams-syndrome.org/
WS is a rare disorder that probably won't be on the radar of most doctors. I don't know much about it but it might be worth checking into.
