- Anomalous arrangement of the pancreaticobiliary ductal system without dilatation of the biliary tract. Murakami, Y., Kodama, T., Takesue, Y., Okita, M., Nakamitsu, A., Imamura, Y., Sewake, H., Tsumura, H., Miyamoto, K., Matsuura, Y. Surgery today. (1992)