My husband has had 2 episodes of what seem to have been gallbladder attacks. The first last dec. he had a ct in ER and all was normal. US two weeks later also showed normal liver, pancreas, gallbladder and bike duct. Most recent attack was very acute two days ago. Ct w/contrast was normal with exception of mildly fatty-liver. This time they did the US the next day and it showed gallbladder wall thickening, sludge and some polyps. They didn t comment on size of polyps or of wall thickening was symmetrical. They also mentioned the mild fatty liver. His blood counts were normal, but bilirubin, analine and amylase were slightly elevated. He is concerned about cancer because of the polyps and thickening that showed up in just five and a half months. Is that something likely?