Abstract
The case of a patient who had lithiasis enclosing ascaris in the common bile duct after invasions of ascaris into the biliary tract twice and who underwent lithotomy eight years thereafter is reported.The patient was a 44-year-old man. An ascaris invaded the biliary tract eight years ago and was spontaneously excreted. One month after that, another ascaris invaded. We attempted to an enucleate it but were unable to do so, and it eventually died in the common bile duct. On endoscopic retrograde cholangio-pancreatography (ERCP) before his discharge, an ascaris remnant was found in the common bile duct. The patient was then admitted to our hospital because of lithiasis in the common bile duct and underwent operation. Two bilirubin-calcium stones were found in the common bile duct and were enucleated. When the stones were examined, the ascaris body was found within them, suggesting that the stone had enclosed the ascaris body, with a core that was the remnant of the ascaris body from eight years ago. As there have been no reports presenting the course of ascaris invasion into the biliary tract, death of the ascaris and lithogenesis enclosing the ascaris, our case is considered to be interesting.
