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Outcome and patterns of care in advanced biliary tract carcinoma (ABC): Experience from two tertiary institutions in the United Kingdom.
Abstracts that were granted an exception in accordance with ASCO's Conflict of Interest Policy are designated with a caret symbol (^).
Background: The ABC-02 trial has defined the standard therapy for patients with advanced biliary tract cancer (ABC), however outcome in an unselected patient population in the UK has not been described. We report the outcome of a series of patients with ABC from two large UK cancer networks. Methods: We retrospectively reviewed all cases of ABC presenting to two UK cancer networks over a 9-year period. Patients with a diagnosis recorded under anatomical site (liver, gallbladder or biliary tree) or histological diagnosis (cholangiocarcinoma or adenocarcinoma, liver), were included. Any patients who had surgery with curative intent were excluded. Overall survival (OS) and factors influencing OS were assessed. For the analysis, chemotherapy regimens were considered as: (i) gemcitabine (G)-based vs. non-G-based, (ii) platinum (P)-based vs. non-P-based and (iii) fluoropyrimidine (F)-based vs. non-F-based. Results: 402 patients were available for analysis. The median OS was 6.2 months. On univariate analysis, age ≥ 70 years (p=0.047), advanced disease stage (p<0.001), gall bladder primary (p=0.033), poor performance status (p<0.001) and lack of chemotherapy (p<0.001) were associated with worse outcome. Survival was superior in the 36.4% of patients who received palliative chemotherapy (12.5 versus 4.3 months; p<0.001). In patients receiving chemotherapy, on multivariate analysis males had higher mortality than females (HR=1.71; p=0.006) and stage 4 disease had a higher mortality (HR=2.62; p=0.002) than stage 1-2 disease. Patients who did not receive F-based regimens (HR=5.12; p=0.022) or G-based regimens (HR=5.01; p=0.021) had a higher mortality, whereas the effect of P-containing regimens was of borderline significance (HR=2.23; p=0.086). Sites, age, and multi-agent regimens were not significant. Conclusions: This is the first retrospective series from the UK and one of the largest population-based studies in ABC and confirms the benefit of palliative chemotherapy in an unselected group of patients. F-based regimens appear to be as effective as G-based treatments.