RADIOLOGY: HEPATOBILIARY: Case# 33069: PROBABLE GALLBLADDER CA. 45 year old man with decreased appetite, vague abdominal pain. 1. Large necrotic mass in the right upper quadrant that appears to emanating from the gallbladder with probable perforation of the gallbladder. This mass appears to extend into the portal region and may be involving the hepatic flexure and proximal duodenum. This most likely represents gallbladder tumor. Less likely based on radiographic appearance and history is chronic infection with large inflammatory mass. 2. There are multiple small to mildly enlarged lymph nodes in the portal region. 3. Mild central biliary dilatation, but the common duct is not dilated.