You mention that you had two surgeries for removal of carcinoid
If these were in the area near appendix
and completely removed that
would be a cure. However if the carcinoid has spread to other organs
such as liver, you can have flushing
etc. If the HIDA scan was mainly
for the liver it might show how the liver is functioning. It may not be
specific for showing recurrent tumor. You may need additional studies
to confirm along with blood tests. CT-Scan and biopsy
If you still have your gallbladder , HIDA-Scan can show if you have
acute inflammation of the gallbladder.
The location of your pain does suggest, it could be a gallbladder attack
Hope you can discuss these with your doctor and get proper treatment.