Hello, i have had also had a complete gasterectomy, a partial pancretectomy and a spleenectomy due to a gastrointestinal stromel tumor so i understand what your brother is going through. If you need some perspective on what i went through, and what i did to help myself(mind you a doctor is always first consulted) please go to http://www.positivecancer.com The posts under mystory explain what i've been through, but i think that quite a few of the posts related to diet, exercise might be of help. the stomach and swallowing pains are very very normal, and mine lasted for some time. His doctor as probably already informed him about dumping syndrome, but if not ask about it. I know that for me i had to relearn how to eat smaller portions, and i still(3 years) cannot eat and drink at the same time. For the first while i would suggest he separate eating and drinking by an hour. Everything else you have said is normal, and with the neck and back pains, make sure that it's not any kind of pleural iffusion(its an infection) because i had that also. Complications after serious surgury and chemo are very very common, but hang in there, and tell your brother the same. Check out the website, and you can of course, email me directly or through the site if you have any more questions. Good Luck.