2019 Volume 61 Issue 8 Pages 1569-1575
A 71-year-old woman was admitted to our hospital to investigate the cause of liver dysfunction. Imaging examinations revealed the thickened wall of the lower bile duct and a tumor in the duodenal papilla. The cytology of the bile juice and brushing of the lower bile duct led to the diagnosis of adenocarcinoma. We diagnosed lower bile duct cancer from these examinations and performed pylorus-preserving pancreaticoduodenectomy. The resected specimen revealed a mass of 15mm in the duodenal papilla. Histological examination showed poor atypicality and smooth muscle and fibrous tissue proliferation. Therefore, it was finally diagnosed as adenomyomatous hyperplasia (AMH). We experienced this rare case of AMH in the duodenal papilla. We report this case with consideration of the literature.
