Hi,
Abdominal Migraine is a form of Migraine seen mainly in children. It's most common in children ages five- to nine-years-old, but can occur in adults as well. Abdominal Migraine consists primarily of abdominal pain, nausea, and vomiting.
As with any form of Migraine, there is no diagnostic test to confirm Abdominal Migraine. Diagnosis is achieved by reviewing both family and patient medical history, evaluating the symptoms, and performing an examination to rule out other causes of the symptoms. Other conditions that should be ruled out to arrive at a diagnosis of abdominal Migraine include: urogenital disorders, peptic ulcer, cholecystitis (gall bladder), Crohn's disease, and irritable bowel syndrome.
ref:http://headaches.about.com/od/migrainediseas1/a/what_abdom_mx.htm
The treatment would be the same as migraine.
not sure why head and stomach pain would be referred to an ENT. Can you be more specific about the symptoms here? And is your child 41 years old or is that a typo?