When the to the ER cause i was having abdominal pain, so they did a CT scan, doctor came back and said I have a small dot on my bladder. I looked at the diagnostics, and it said it s a mass on my urinary bladder, concerned because I had my gallstones removed 2 years ago, I was wondering does this have anything to do with this? I m concerned about the mass on my urinary bladder, if there is a safe way for treatment to remove it, hoping it s not a major sign of cancer.