Hi.
Thanks for your query.
Noted the history of pain in the area above the naval, for 6+ weeks, diarrhea, nausea, increase in pain hours after food, more so with fatty food,
Gall bladder on US and HIDA scan is negative.
Yes, 89% is normal or HIDA scan functioning of gall bladder.
The probable reason looks to be
pancreatic insufficiency and/or
duodenal ulcer which get instigated once the liquefied food is released from the stomach after 2 hour of eating.
I would advise you the following:
Upper GI Endoscopy
ERCP with
endoscopic ultrasound called Endo US.
MRCP.
Tests of blood: CBC, Liver function tests, amylase, lipase,
Stool for routine and occult blood.
Tests of urine.
Clinical evaluation by a
General Surgeon.
All these helps for proper diagnosis and gives a plan to get you a cure.