Topic: World Congress - Barcelona

Note:  Suggested findings

One abstract of interest.  Quote:
Kato, A, etc. Chiba University, Chiba, Japan
Poster Discussion: 0037: Lymph Node staging in biliary tract cancer using Pet scan:  A comparison study with CT.

Background: Aim of this study was to evaluate the value and limitations of (18F) FDG positron emission (PET) for detection of lymph node staging of biliary tract cancer compared with computed tomography (CT)

Results:  For primary tumors, FDG-PET showed a sensitivity of 100% for intrahepatic CC, 60% for extrahepatic CC, 86% for gallbladder carcinoma, and 40 % of papilla Vater carcinoma.
Overall accuracy of FDG-PET was not significantly different from that of CC for regional lymph node metastases in patients with biliary tract cancer.  However, the specificity of FDG-PET was significantly higher than that of CT.  For para-aortic lymph node metastases, PET and CT had the same sensitivity, specificity, and accuracy.

Conclusion:  FDG-PET is accurate as CT for the detection of regional lymph node metastases in patients with biliary tract cancer.  Furthermore, the low sensitivities of FDG-PET and CT were insufficient to allow decision making on staging of lymph node metastases before surgery.  However, the high specificity of FDG-PET for lymph node metastases appeared valuable, and the presence of lymph node on FDG-PET may have a clinically significant impact on the choice of surgical respectability.

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