Ma'am I am sorry to inform you that a number of our "Experts" have looked at the information within your post.
Several Md's have looked as well as Nurses and myself. Others in he medical field of "Experts" have also looked over the post.
Your child has indeed gone through extensive medical examination and testing by many specialist. All showing no known cause to the problem.
With all the testing done and mentioned in your post we feel that it is beyond any of our "Experts" ability to render you an informed well rounded answer of any type that would possibly come close to answering your question.
We suggest that you continue to have him examined by his primary and secondary Medical Specialist.
Thank you for using and trusting your question with Just Answer.