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  • Title: Cost utility of ERCP-based modalities for the diagnosis of cholangiocarcinoma in primary sclerosing cholangitis.
    Author: Njei B, McCarty TR, Varadarajulu S, Navaneethan U.
    Journal: Gastrointest Endosc; 2017 Apr; 85(4):773-781.e10. PubMed ID: 27590963.
    Abstract:
    BACKGROUND AND AIMS: Cholangiocarcinoma (CCA) is a leading cause of morbidity and mortality in patients with primary sclerosing cholangitis (PSC). Although several ERCP-based diagnostic modalities are available for diagnosing CCA, it is unclear whether one modality is more cost-effective than the others. The primary aim of this study was to compare the cost-effectiveness of ERCP-based techniques for diagnosing CCA in patients with PSC-induced biliary strictures. METHODS: We performed a cost utility analysis to assess the net monetary benefit for accurately diagnosing CCA using 5 different diagnostic strategies: (1) ERCP with bile duct brushing for cytology, (2) ERCP with brushings for cytology and fluorescence in situ hybridization (FISH)-trisomy, (3) ERCP with brushings for cytology and FISH-polysomy, (4) ERCP with intraductal biopsy sampling, and (5) single-operator cholangioscopy (SOC) with targeted biopsy sampling. A Monte Carlo simulation assessed outcomes including quality-adjusted life years (QALYs) and the incremental cost-effectiveness ratio (ICER). Sensitivity analyses were also performed. RESULTS: SOC with targeted biopsy sampling, as compared with ERCP with brushing for FISH-polysomy, produced an incremental QALY gain of .22 at an additional cost of $8562.44, resulting in a base case ICER of $39,277.25. Deterministic and probabilistic sensitivity analyses demonstrated that diagnosis with SOC was cost-effective at conventional willingness-to-pay thresholds of $50,000 and $100,000. SOC was the most cost-effective diagnostic strategy. CONCLUSIONS: SOC with biopsy sampling is the most cost-effective diagnostic modality for CCA in PSC strictures.
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