Many congenital brain defects cause minor neurological impairment. People with these types of congenital brain defects can grow to function independently. Other defects are so severe that they are fatal before or shortly after birth. Some cause significant disabilities.
I am looking into this for a friend as well. The pancreas deals with digestive juices and insulin. Have a look at your medications to see if they may have gastrointestinal effects. I can tell you that Tramadol does affect the production of enzymes in the intestine.
Any treatment for pancreatic cancer(surgery, radiation therapy, and chemotherapy) can alter nutritional needs and interfere with the ability to eat, digest, or absorb food. This is often due to side effects such as nausea, vomiting, changes in taste or smell, loss of appetite or bowel changes.