RT Book, Section A1 Doherty, Gerard M. SR Print(0) ID 58104272 T1 Biliary Neoplasms, Benign T2 Quick Answers Surgery YR 2010 FD 2010 PB The McGraw-Hill Companies PP New York, NY SN LK accesssurgery.mhmedical.com/content.aspx?aid=58104272 RD 2024/03/28 AB • Gallbladder adenoma-Rare-Considered premalignant lesion-Minimal to no risk if < 1 cm• Papillomatosis: Multiple gallbladder adenomas• Adenomyomatosis: Gallbladder wall hyperplasia that can be diffuse, possibly premalignant• Leiomyomas, lipomas, hemangiomas, and heterotopic GI tissue are all other possible benign biliary neoplasms• Approximately 67% of benign biliary neoplasms are polyps, adenomatous papillomas, or bile duct adenomas; not known to have malignant potential• 47% of benign biliary neoplasms found in periampullary region and 27% found in common bile duct