Japanese Journal of Clinical Oncology Advance Access originally published online on August 14, 2006
Japanese Journal of Clinical Oncology 2006 36(10):638-642; doi:10.1093/jjco/hyl077
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© 2006 Foundation for Promotion of Cancer Research
Double Cancer of Gall Bladder and Bile Duct not Associated with Anomalous Junction of the Pancreaticobiliary Duct System
1 Department of Gastroenterological Surgery, Kobe University Graduate School of Medical Sciences, Kobe and 2 Department of Surgical and Molecular Pathology, Dokkyo University School of Medicine, Shimotsuga-gun, Tochigi, Japan
For reprints and all correspondence: Tetsuo Ajiki, Department of Gastroenterological Surgery, Kobe University Graduate School of Medical Sciences, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan. E-mail: ajiki{at}med.kobe-u.ac.jp
Received February 15, 2006; accepted June 14, 2006
Background: Simultaneous double cancers of the biliary tract are rare. Most of them are thought to be associated with pancreaticobiliary maljunction (PBM); however, the characteristics of tumours without PBM are still unclear.
Methods: Histology, immunoreactivity with carcinoembryonic antigen, carbohydrate antigen 19-9 and p53 and mutations in the K-ras gene were examined in tumours resected from cases of simultaneous double cancers of the biliary tract.
Results: Four cases of simultaneous double cancers of the biliary tract were identified among 108 patients with biliary tract cancer (3.7%). None of the four cases associated with PBM, and the results of histological, immunohistochemical and genetic examinations differed between the bile duct and gall bladder cancers in each case.
Conclusion: Even when they do not associate with PBM, double cancers in the biliary tract are more likely to be the result of multicentric development.
Key Words: double cancer gall bladder bile duct K-ras p53