I just had a HIDA scan for my gallbladder, and they called me with the results and told me that it was expelling at 20% and that I needed surgery( of course) But I am puzzled because they never told me that I have stones- So can you have problems without stones, and what do think about doing a liver/gallbladder cleanse before opting for surgery?They say that the cleanse is to expel stones overnight so I'm unsure. I haven't really had an attack since August. Any help would be appreciated! Thanks!