Porcelain gallbladder: relation between its type by ultrasound and incidence of cancer

We report a case of porcelain gallbladder in a 67-year-old Japanese woman and review, summarize, and tabulate the literature describing its ultrasound appearance. We classify the ultrasound finding of porcelain gallbladder into two types: a complete type and an incomplete type. The relation between the type of porcelain gallbladder and pathological features is important because in the incomplete type the frequency of cancer was much higher than in the complete type.