It sounds like your symptoms are definitely related to your gallbladder
, given that the HIDA scan recreated your symptoms - which sounds like pain and nausea
with gallbladder contraction. Basically, what the HIDA scan does is measure how well your gallbladder empties - although you may not have had stones, it sounds like your gallbladder just doesn't empty well.
I'd find a general surgeon
who is willing to take out your gallbladder, and I'd also talk to him about doing an intraoperative cholangiogram, which is a special X-ray that he can do at the time of gallbladder removal which will help evaluate your common bile duct and see why it is dilated. Sometimes intraoperative cholangiogram can pick up things that other studies don't see. Another study to consider is a special MRI
or an MRCP that may be able to help figure out why your common bile duct is dilated.
Overall, it sounds like given the symptoms you have had during the HIDA you're warranted for a gallbladder removal.
I hope I have answered your questions. Please feel free to contact me if you have any further questions or if you feel I haven't addressed your question adequately.