Lambliasis detected during treatment for a gallbladder polyp

Abstract

While a 53-year-old female was being treated for a gallbladder polyp and pancreatic cystic disease. ERCP revealed a mass suggesting a polyp in the gallbladder. There was neither pancreatic duct abnormality nor pancreaticobiliary maljunction. Cytological examination of bile and pancreatic juice showed trophozoites of Giardia lambia. After treatment with metronidazole, surgery was performed. Laparoscopic cholecystectomy was performed. Pathological examination showed foamy cell aggregation in the lamina propria, and the diagnosis of a cholesterol polyp was made. No Giardia lambia was observed on a whole mount section. She had no history of traveling overseas, homosexuality, or opportunistic infection, and a diagnosis of asymptomatic lambliasis was made. There are also reports of lambliasis and was confirmed to about 0.5% of the subjects colonoscopy also in literature, was considered if there is a relatively common disease. Although this disease is a rare disease itself, it was suggested that the possibility of chronic infection of this disease has been overlooked as a cause of biliary tract disease.