Gallbladder cancer (GBC) incidence ranges from 12 - 62% when porcelain gallbladder (PGB) is seen. You ever wonder where these numbers come from? Well, these are the quoted numbers from two studies done in 1959 and 1966. These studies also indicated that if porcelain gallbladder was seen, that a prophylactic cholecystectomy should be performed. Is this the best evidence we have? Is there nothing more recent? Well, it turns out there is.